Red dot reliability, with the receipts

Medium confidence (10 sources, 8 first-hand)

• Rounds tested: ~4,160
• Durability: 6 of 6 passed
• Documented failures: 3
• Battery: CR2032: First-hand owner runtimes vary sharply with brightness and battery brand. CSIGunNut (owns several P-2s) measured just under 3 to 4 months on Duracell CR2032s running setting 7 on a carry gun; BlueShirtGuy reported 10 to 11 months on Energizer. Other owners report roughly 10 days to depletion at maximum brightness, versus a battery installed Jan 2023 still running 1+ year later on setting 6 all day. One owner ran two P-2s 5.5+ months continuously without the battery dying and called it an improvement over the P-1.
• Warranty: Owners report Aimpoint replaced failing P-2 units quickly under warranty.

Medium confidence (9 sources, 4 first-hand)

• Durability: 5 of 6 passed
• Documented failures: 1
• Battery: AAA: No first-hand measured runtime to depletion exists. Two reviewers explicitly declined to test the runtime claim: Ed Friedman (Shooting Illustrated) wrote 'Full disclosure: I did not test those claims,' and Eric B (TFB) noted that verifying it 'would have to wait for a very long time, so we haven't.' Testers ran the optic always-on without exhausting a cell, but none is a controlled measurement.
• Warranty: Aimpoint factory warranty: free from defects in material and workmanship for 10 years personal use and 2 years professional / competition / law enforcement use, from date of purchase; non-transferable (original purchaser only). It is NOT a lifetime/transferable warranty despite some third-party pages saying so.

Medium confidence (8 sources, 6 first-hand)

• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR2032: No first-hand measured T-2 runtime to depletion found. Closest first-hand: a tester left a sister-model H-2 running at a medium setting for nearly 3 years on one battery before selling it (still working); another tester's personal Micro T-1 ran ~2 years and remained as bright as day one. Both are T-1/H-2, not the T-2 itself.
• Warranty: Aimpoint factory warranty: free from defects in material and workmanship for 10 years personal use / 2 years professional or competition use (manufacturer-stated).

High confidence (6 sources, 3 first-hand)

• Rounds tested: thousands
• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: DL1/3N: No first-hand measured runtime to depletion was found. Testers ran the PRO always-on for years without exhausting a battery: Eric Hung used it almost 3 years (frequently above setting 7) without battery trouble, and Adriel (Hunting Gear Guy) reported it 'completely reliable' across competition use, carrying a spare only as insurance and never needing it. None of these is a controlled measurement, so measured runtime is unknown.
• Warranty: Aimpoint factory warranty: free from defects in material and workmanship for 10 years personal use and 2 years professional / competition / law enforcement use (manufacturer-stated; non-transferable, voided by disassembly).

High confidence (9 sources, 5 first-hand)

• Rounds tested: ~500+
• Durability: 5 of 5 passed
• Documented failures: 2
• Recall on record
• Battery: CR123A: ~1,023 hrs at brightness setting 12 in one user test; another user test saw the low-battery indicator begin flashing at ~1,552 hrs and the optic fail to power on at ~1,648 hrs (lower brightness). Holographic design is battery-hungry vs LED red dots.
• Warranty: 10-year limited Prestige Warranty on HWS units made on/after 2017-01-01 (free repair/replace years 1-5, repair for a nominal bench fee years 5-10; transferable to subsequent owners). Units made before 2017-01-01 carried only a 2-year warranty plus a $79 bench-fee repair thereafter.

Medium confidence (7 sources, 2 first-hand)

• Durability: 2 of 2 passed
• Documented failures: none documented
• Battery: none (passive magnifier, no battery)
• Warranty: 10-year EOTech Prestige Warranty (covers magnifiers as well as holographic sights): free repair or replacement with a comparable product in years 1-5; in years 5-10 EOTech will evaluate and repair defects in materials and workmanship for a nominal bench fee (listed at $79). Transferable to subsequent owners for the remainder of the term.

Medium confidence (7 sources, 5 first-hand)

• Rounds tested: 500+
• Durability: 1 of 2 passed
• Documented failures: 3
• Battery: CR1632: 50,000 hrs (dot only) / up to 10,000 hrs (full reticle) on mid setting
• Warranty: Holosun limited lifetime warranty; first-hand reporter's warranty replacement worked fine, consistent with Holosun's generally well-regarded replacement turnaround.

Medium confidence (6 sources, 4 first-hand)

• Rounds tested: ~200-300
• Documented failures: none documented
• Battery: CR1632: 50,000 hours at a low/medium brightness setting (manufacturer)
• Warranty: Holosun limited lifetime warranty on the metal housing and optical glass, 10-year coverage on the LED illumination system from manufacture date, product registration required; warranty honored only for units bought from Holosun or authorized dealers (not gray-market Amazon/eBay).

Medium confidence (8 sources, 6 first-hand)

• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR2032: 50,000 hr, per Holosun (manufacturer does not designate a brightness setting for the AEMS figure)
• Warranty: Holosun limited lifetime warranty on the metal structure and optical glass, plus 10 years from manufacture date on the LED/illumination/electronics; product registration required.

Medium confidence (6 sources, 4 first-hand)

• Rounds tested: ~250
• Durability: 4 of 4 passed
• Documented failures: 1
• Battery: CR1620: 50,000 hr at brightness setting 6 (CR1620 red; CR1632 green)
• Warranty: Holosun limited lifetime warranty on the metal housing and optical glass, 10-year coverage on the LED illumination system; product registration required (commercial models).

Medium confidence (5 sources, 3 first-hand)

• Rounds tested: 8000+
• Durability: 4 of 5 passed
• Documented failures: none documented
• Battery: CR1632: 50,000 hr at brightness setting 6 (CR1632, red reticle), per Holosun
• Warranty: Holosun limited lifetime warranty on the metal housing and optical glass; 10 years on the LED illumination system from manufacture date; product registration required to validate. Commercial models used for professional purposes, or units bought from non-authorized Amazon/eBay sellers, are not covered.

Medium confidence (10 sources, 6 first-hand)

• Rounds tested: 13,220+
• Durability: 2 of 2 passed
• Documented failures: none documented
• Battery: CR1632: 50,000 hr at brightness setting 6 (of 10), per Holosun
• Warranty: Holosun limited lifetime warranty on the metal structure and optical glass, plus 10 years from manufacture date on the LED/illumination system; product registration required. (A 3-year term applies only to LEM / professional-line variants, not the standard commercial HE509T-RD X2.)

Medium confidence (4 sources, 2 first-hand)

• Rounds tested: 5200+
• Durability: 5 of 5 passed
• Documented failures: 1
• Battery: CR1632: 50,000 hours at brightness setting 6 (manufacturer)
• Warranty: Holosun limited lifetime warranty on the metal housing and optical glass under normal personal use, with 10-year coverage on the LED illumination system from the manufacture date; product registration required to validate the warranty; warranty not honored on units sold by non-authorized Amazon resellers / gray-market channels.

Medium confidence (4 sources, 3 first-hand)

• Rounds tested: thousands
• Durability: 4 of 4 passed
• Documented failures: none documented
• Battery: CR2032: One first-hand competitor reported never replacing the CR2032 across three years of regular IPSC use, though he attributes part of that to the solar backup and is uncertain how much was battery versus solar. This is an in-use observation, not a controlled runtime measurement.

Medium confidence (8 sources, 5 first-hand)

• Durability: 4 of 4 passed
• Documented failures: none documented
• Battery: CR2032: 29,000 hours at the medium setting, in a stated 25,001 to 50,000 hour range depending on brightness, on a single CR2032, per Primary Arms; AutoLive motion sleep is the main runtime extender.
• Warranty: Primary Arms Limited Lifetime Warranty on PA-branded optics: fully transferable, no proof of first ownership or original receipt required, covering manufacturer defects, materials and workmanship and normal wear-and-tear affecting function; excludes misuse, abuse, accident, alteration and lost/stolen items. Reviewers (s1, s5) confirm the optic carries the PA lifetime warranty.

Medium confidence (9 sources, 7 first-hand)

• Rounds tested: ~200
• Durability: 4 of 4 passed
• Documented failures: none documented
• Battery: CR2032: Up to 29,000 hours on the medium setting on a single CR2032, per Primary Arms, with AutoLive motion sleep cited as the runtime extender.
• Warranty: Primary Arms Lifetime Warranty on PA-branded optics: fully transferable, no proof of first ownership or original receipt required, covering manufacturer defects in materials and workmanship and normal wear-and-tear affecting function; excludes misuse, abuse, accident, alteration and lost/stolen items (s9). The manufacturer product page (s8) lists 'Lifetime Warranty' for this SKU.

Medium confidence (12 sources, 9 first-hand)

• Rounds tested: ~1,200
• Durability: 4 of 4 passed
• Documented failures: 3
• Battery: CR1632: No rigorous controlled drain test was published. Daniel Reedy observed roughly under three weeks of runtime at MAXIMUM brightness across two of his write-ups (s1, s9); this is one tester, not independent corroboration. The 13,000-hour medium-setting figure was not verified by any measurement.
• Warranty: Steiner Heritage Warranty: lifetime on mechanical/optical, 3 years on electronics; transferable between owners with no receipt or registration required (U.S. and Canada, items made since 2014; unauthorized-retailer purchases may be denied). Warranty service praised as fast first-hand: Reedy received a reply before noon the next business day and a full replacement in about two weeks.

High confidence (4 sources, 4 first-hand)

• Rounds tested: 1500+
• Durability: 5 of 5 passed
• Documented failures: 1
• Battery: CR2032: 5 years continuous-on at daylight setting 3 (red 2 MOA, CR2032), per Trijicon and cited consistently across reviewers; the green-dot MRO variant is far shorter at about 1 year due to the laser-diode emitter.

Medium confidence (9 sources, 6 first-hand)

• Rounds tested: ~2,000-3,000
• Durability: 4 of 4 passed
• Documented failures: none documented
• Battery: CR2032: 6+ years of continuous operation at Setting 5 (stated equivalently as 50,000+ hours)
• Warranty: Trijicon limited lifetime warranty on the optical system and metal housing for the lifetime of the original owner; electronics/illumination are covered separately (Trijicon's documented standard for its LED optics is 5 years from date of manufacture). CAVEAT: the readable Trijicon warranty card (s8) predates and does not name the RCR, so the RCR-specific electronics term could not be confirmed from a primary readable source; the current Trijicon warranty page returned HTTP 403.

Medium confidence (7 sources, 5 first-hand)

• Rounds tested: ~14,900
• Durability: 2 of 2 passed
• Documented failures: 1
• Battery: CR2032: ~3 years continuous dot-only at brightness setting 5 (Trijicon marketing); spec-sheet upper bound cited as up to 50,000 hr
• Warranty: Lifetime warranty on the optic and metal housing (original owner); electronics/LED illumination covered 5 years from date of manufacture. Per a resolving reseller restatement of Trijicon's policy; Trijicon's own warranty page returned HTTP 403 (firstHand:false).

High confidence (8 sources, 6 first-hand)

• Rounds tested: 20000+
• Durability: 6 of 6 passed
• Documented failures: 2
• Battery: CR2032: up to 4 years continuous (CR2032), per Trijicon; Sage Dynamics observes ~2-5 years 'depending on use' and recommends annual replacement

High confidence (7 sources, 5 first-hand)

• Rounds tested: 5000+
• Durability: 3 of 3 passed
• Documented failures: 3
• Battery: CR2032: 3 yr continuous at brightness setting 4 of 8 (red models, per Trijicon); 2 yr at setting 4 of 8 (green 2.5 MOA model)

Medium confidence (6 sources, 4 first-hand)

• Rounds tested: several hundred
• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR2032: Vortex does not publish an hours figure for the Gen II; runtime is managed by a 14-hour auto-shutoff that powers the illumination down after inactivity to preserve the cell, per the manufacturer.
• Warranty: Vortex VIP Warranty: a fully transferable, unlimited lifetime warranty that requires no warranty card, no receipt and no proof of purchase, and covers damage regardless of fault or cause (it is a no-fault repair-or-replace promise, not limited to manufacturing defects). Per the manufacturer (s6).

Medium confidence (7 sources, 3 first-hand)

• Rounds tested: hundreds
• Durability: 2 of 2 passed
• Documented failures: none documented
• Battery: CR2032: 30,000 hours (over 3 years) of constant-on use at daylight setting 7 of 10, and longer on the 4 night-vision settings, via Aimpoint ACET technology (manufacturer claim).
• Warranty: Aimpoint factory warranty: 10 years personal use and 2 years professional / competition use against defects in material and workmanship; non-transferable, voided by disassembly (manufacturer-stated).

Medium confidence (6 sources, 5 first-hand)

• Rounds tested: ~3,000
• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR2032: ~1,000 hr at medium brightness (first-hand observation, not a controlled drain test)
• Warranty: Bushnell limited lifetime warranty (Ironclad) per the manufacturer; not independently tested by a cited source.

Low confidence (4 sources, 1 first-hand)

• Durability: 2 of 2 passed
• Documented failures: none documented
• Battery: CR2032: 50,000 hr at brightness setting 6 (CR2032), per Holosun
• Warranty: Holosun limited lifetime warranty on the metal housing and optical glass, 10-year coverage on the LED illumination system; product registration required (commercial models).

Medium confidence (7 sources, 5 first-hand)

• Rounds tested: ~5,000-7,000
• Durability: 3 of 3 passed
• Documented failures: 2
• Battery: none (passive magnifier, no battery)
• Warranty: Holosun warrants the metal housing and optical glass for the life of the product under normal personal use (the entire passive magnifier sits in this lifetime tier; the separate 10-year LED/electronics tier does not apply). Registration is required to validate the warranty, which owners flag as a friction point versus no-questions policies. MANUFACTURER-STATED via s6, firstHand:false.

Low confidence (5 sources, 2 first-hand)

• Documented failures: 1
• Battery: CR2032: 50,000 hours on a single CR2032 (Holosun-rated, roughly setting 6 / moderate brightness); 12 brightness settings (10 daylight + 2 night-vision)
• Warranty: Holosun Limited Lifetime Warranty on the metal housing and optical glass; the illumination/electronics (LED) covered 10 years from the manufacture date; applies to the first owner upon product registration (per the current Holosun warranty policy, s5).

Low confidence (6 sources, 2 first-hand)

• Rounds tested: 5000+
• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR1632: 15,000 hr at lowest setting (about 625 days), per Nikon
• Warranty: Marketed at launch with a Nikon 5-year warranty (s3, s4). That coverage is now effectively orphaned: in September 2019 Nikon restructured its optics warranties and dropped electrical components to a 1-year limited warranty (s6), and in late 2019 Nikon announced it was exiting the US riflescope business (s5); the P-Tactical reflex line was caught in the same wind-down and is now discontinued (retailers list it discontinued by Nikon). With no current production, no restock, and depleted parts/accessories, post-exit warranty and support are limited and uncertain. Treat the 5-year figure as a nominal launch claim, not dependable present-day coverage.

Low confidence (8 sources, 6 first-hand)

• Durability: 2 of 2 passed
• Documented failures: none documented
• Battery: CR2032: Up to 50,000 hours at a medium setting for the 2 MOA dot version, and roughly 12,000 hours (about a year) for the ACSS-CQB reticle version, which draws more current; on a single CR2032, per Primary Arms.
• Warranty: Primary Arms Limited Lifetime Warranty on all PA-branded optics purchased on or after Jan 1, 2021: fully transferable with no proof of first ownership or original receipt required, covering manufacturer defects, materials/workmanship and normal wear-and-tear affecting function; excludes misuse, abuse, accident, alteration and lost/stolen items.

Medium confidence (5 sources, 4 first-hand)

• Rounds tested: 700+
• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR1632: 20,000 hours with MOTAC motion activation
• Warranty: Sig Sauer Electro-Optics Infinite Guarantee: fully transferable, no receipt or warranty card required, covers damage/defects at no charge; plus a separate 5-year limited warranty on electronic components (tritium excluded). A real, meaningful warranty signal.

High confidence (7 sources, 5 first-hand)

• Rounds tested: ~1,800
• Durability: 6 of 6 passed
• Documented failures: 1
• Battery: CR2032: 40,000+ hours of normal use (CR2032) with MOTAC motion activation, per Sig Sauer (Shooting Illustrated's 2017 writeup cited 50,000 hours).
• Warranty: Sig Sauer Electro-Optics Infinite Guarantee: unlimited lifetime, fully transferable, no receipt or warranty card required, no charge; plus a separate 5-year limited warranty on electronic components (s5). A meaningful warranty signal, and first-hand reports confirm Sig has actually replaced failed units (s6).

Low confidence (8 sources, 5 first-hand)

• Rounds tested: ~1,000
• Durability: 3 of 3 passed
• Documented failures: 2
• Battery: CR123A: 200 to 2,000 hours (CR123A), per Sightmark
• Warranty: Sightmark Limited Lifetime Warranty against defects in materials and workmanship (10-year term outside the US). IMPORTANT measured-vs-marketing: the light-emitting components (the LED illumination) carry only a 3-year warranty and disposable batteries are not covered, so 'lifetime' applies to the housing/workmanship, not the electronics. Registration within 30 days or proof of purchase required.

Medium confidence (9 sources, 4 first-hand)

• Durability: 3 of 3 passed
• Documented failures: none documented
• Battery: CR123A: 3,000 hours maximum on a single CR123A, per Swampfox.
• Warranty: Limited lifetime warranty against manufacturing defects and material flaws on the housing and glass, with the illumination/electronic system warrantied 10 years from manufacture, plus a 50,000-round guarantee (Swampfox repairs or replaces the optic if it fails before 50,000 rounds; published on a separate Swampfox guarantee page, s9) and a 30-day satisfaction return window, per Swampfox warranty page (s6).

Medium confidence (7 sources, 5 first-hand)

• Rounds tested: ~770
• Durability: 3 of 3 passed
• Documented failures: 1
• Battery: CR123A: When left actively powered on, runtime tracks roughly to the ~1,500 hr spec: Baxter (s3) kept it on for over two months without a swap. Real-world standby is far worse: RECOIL (s1) went through 'nearly a dozen' CR123A batteries over about a year of intermittent carry because the shake-awake rest mode keeps drawing power and there is no true off switch.
• Warranty: Vortex VIP Warranty: unlimited, unconditional, lifetime, fully transferable, no-fault. Per Vortex (s8): repaired or replaced at no charge regardless of how it happened, whose fault it was, or where purchased; no receipt, registration, or warranty card required. This no-questions lifetime policy is a meaningful reliability-reputation backstop, the same VIP coverage that anchors the rest of the Vortex line.

Medium confidence (6 sources, 4 first-hand)

• Durability: 2 of 2 passed
• Documented failures: 1
• Battery: CR2032: 50,000 hours at brightness setting 6 (Gen 2 CF-RD2, Vortex spec; the Gen 1 CF-RD1 was rated 7,000 hours). Setting/level dependent; equates to roughly 5.7 years continuous.
• Warranty: Vortex VIP Warranty: unlimited, unconditional, lifetime, no-fault. Per Vortex (s5): 'we'll repair or replace it at no charge to you. It doesn't matter how it happened, whose fault it was, or where you purchased it.' No receipt, no registration, no warranty card, fully transferable; excludes loss, theft, and deliberate/cosmetic damage. This no-questions replacement policy is a major reliability-reputation offset for a value-tier optic and is consistently praised across the first-hand reviews.

Low confidence (7 sources, 5 first-hand)

• Rounds tested: ~5,000 (est., generation unconfirmed)
• Durability: 3 of 3 passed
• Documented failures: 1
• Battery: AAA: 50,000 hours (Vortex spec; setting not stated, consistent with a low/medium brightness setting)
• Warranty: Vortex VIP Warranty: unlimited, unconditional, lifetime, no-fault. Per Vortex (s5): 'we'll repair or replace it at no charge to you. It doesn't matter how it happened, whose fault it was, or where you purchased it.' No warranty card, no receipt, no time limit, fully transferable; excludes loss, theft, and deliberate/cosmetic damage. Multiple first-hand owners above used it successfully for free replacement. This no-questions policy is a major reliability-reputation offset for a budget optic.

Medium confidence (10 sources, 8 first-hand)

• Rounds tested: thousands
• Durability: 3 of 3 passed
• Documented failures: 3
• Battery: CR1632: up to 5 years (Burris), predicated on the 8-hour auto-shutoff and not a continuous-on runtime
• Warranty: Burris Forever Warranty (now rebranded the Burris Signature Warranty, coverage unchanged): lifetime, fully transferable to future owners, no receipt required, covering defects in materials and workmanship on non-thermal optics. In practice owners (s8, s9, s10) had FastFire units repaired/replaced without receipt hassle, though one reported a lengthy email diagnostic before approval. A citable reliability-reputation signal for a budget optic.

Medium confidence (7 sources, 5 first-hand)

• Rounds tested: 14300
• Durability: 5 of 6 passed
• Documented failures: 3
• Battery: CR2032: inconsistent; reviewer changes battery every ~6 months; some users every few months, others ~yearly
• Warranty: Leupold Full Lifetime Guarantee: free repair or replacement for any owner (transferable, no proof of purchase required), explicitly covering the electronics. The DPP's documented weakness is recoil-induced electronic/dot failure in the low-thousands of rounds (see failures), a mid-life pattern rather than out-of-box mortality; no first-hand DOA/early-death rate data was found.

Low confidence (6 sources, 4 first-hand)

• Durability: 2 of 3 passed
• Documented failures: 1
• Battery: CR2: up to 80,000 hours on brightness setting 6 (Vortex spec, relayed first-hand by s1). CR2 battery confirmed as included on the Vortex spec page (s6).
• Warranty: Vortex VIP Warranty: unlimited, unconditional, lifetime, no-fault. Per Vortex (s5): 'If your Vortex product, whether a riflescope, red dot, rangefinder, apparel, or accessory, becomes damaged or defective, we'll repair or replace it at no charge to you,' and 'It doesn't matter how it happened, whose fault it was, or where you purchased it.' Excludes loss, theft, deliberate damage, and cosmetic damage that does not hinder performance. This no-questions lifetime replacement policy is a major reliability-reputation signal that offsets the budget tier's higher QC variance.

Medium confidence (4 sources, 3 first-hand)

• Rounds tested: thousands
• Durability: 3 of 3 passed
• Documented failures: 2
• Battery: CR1632: 150 hours at highest setting; up to 30,000 hours at lowest setting (Vortex spec, relayed first-hand by s3). Note: s1 lists ~3,000 hours on lower settings, which conflicts with the 30,000-hour Vortex figure and reads as a likely typo.
• Warranty: Vortex VIP Warranty: unlimited, unconditional, lifetime, no-fault. Per Vortex (s4): 'If your Vortex product becomes damaged or defective, we'll repair or replace it at no charge to you. It doesn't matter how it happened, whose fault it was, or where you purchased it.' No receipt, registration, or warranty card required; if not repairable, replaced with equal or better. Excludes loss, theft, deliberate damage, and cosmetic damage that does not hinder performance. This no-questions replacement policy is a major reliability-reputation signal that offsets the budget tier's higher QC variance.

Low confidence (1 source, 0 first-hand)

• Documented failures: none documented
• Battery: LR44
• Warranty: Tacticon advertises a lifetime warranty plus a no-hassle 100% satisfaction guarantee on the Predator V2 (manufacturer marketing). This is a warranty/return promise, not a measured durability spec, and no first-hand data on warranty turnaround or DOA/infant-mortality rates was found.

Low confidence (3 sources, 0 first-hand)

• Documented failures: none documented
• Battery: CR2032: no published runtime hour figure; CR2032, two cells included
• Warranty: Marketed as a 'lifetime warranty' on product pages, but Tacticon's stated policy is a 2-Year Limited Lifetime Manufacturer Defect Warranty covering manufacturing defects only, excluding normal wear and tear, loss/theft, and altered or modified products. Treat the headline 'lifetime' wording as marketing; the actual defect coverage is the 2-year limited policy.