Athlon Helos BTR Gen2 1-10x28

LPVOSFPMOA34 mm tubeIlluminated

The Athlon Helos BTR Gen2 1-10x28 is a 1-10×28 SFP scope on a 34 mm tube with a ATMR4 SFP IR MOA reticle, illuminated and 0.5 MOA clicks. Across its range the exit pupil runs from an estimated 28 mm down to 2.8 mm at 10×, where the twilight factor is 16.7. At 10× its estimated 2.8 mm exit pupil is among the smallest of the 10 LPVOs here — it will go dim at top power in poor light.

Approx. price: ~$587
Magnification: 1-10×
Objective: 28 mm
Weight: 18.3 oz

Best for

A carbine that has to work at 1× up close and still reach out past 300 yards

Manufacturer’s product page — not an affiliate link. Price and availability there may differ from our snapshot.

Derived optics

estimated

Exit pupil: 28–2.8 mm (1×–10×)
Twilight factor: 16.7 at 10×
Zoom ratio: 10×

Exit pupil and twilight factor are computed from the published magnification and objective diameter, not measured. Real exit pupil is also capped by the erector at low magnification, and coatings and glass quality move low-light performance in ways the formula cannot see — read these as comparisons between layouts, not verdicts on scopes.

Specifications

Manufacturer-published figures, read from athlonoptics.com (product page + 214103 spec sheet PDF; only the ATMR4 MOA reticle is listed for the 1-10x28). MOA/MRAD conversions use 3.438 MOA per mil.

Magnification: 1-10×
Objective lens: 28 mm
Focal plane: SFP
Reticle: ATMR4 SFP IR MOA
Illuminated: Yes
Turret unit: MOA
Per click: 0.5 MOA (0.52″ at 100 yd)
Elevation travel: 100 MOA (≈29.1 MRAD)
Windage travel: 100 MOA
Zero stop: No
Turrets: Capped
Parallax: Fixed 100 yd
Eye relief: 3.2″
Field of view: 110–10 ft at 100 yd
Tube: 34 mm
Length: 10.3″
Weight: 18.3 oz
Warranty: Athlon Lifetime Warranty

Features

SFP
MOA
34 mm tube
Illuminated
Capped turrets
Fixed parallax
True 1×
Lifetime warranty

For it, on paper

+ True 1-10x range with a 110 ft field of view at 1x
+ Capped turrets with 100 MOA of travel, plenty for any LPVO mount
+ Illuminated etched-glass ATMR4 reticle
+ 10.3 in long
+ Argon purged, one-piece 34 mm tube

Against it, on paper

− 18.3 oz, heavier than most 1-6x and 1-8x LPVOs
− 34 mm tube needs 34 mm rings or a 34 mm mount, which cost more than 30 mm
− Second focal plane: the ATMR4 holdovers are only correct at 10x
− 3.2 in eye relief is short for a 10x top end
− 1/2 MOA clicks and fixed 100 yd parallax, so fine zeroing and close targets at 10x are compromises