Getting into precision rifle shooting with an FFP scope that has locking turrets, a zero stop, and a usable Christmas-tree reticle usually means spending $800 or more — scopes under that price typically drop one of those features. The Athlon Helos BTR GEN2 4-20x50 puts all three in a 30mm FFP package under $650, giving new PRS and long-range shooters a legitimate starting platform they will not immediately outgrow.

The APLR6 reticle features a floating 2 MOA center cross with 1 MOA hash marks and a Christmas-tree holdover grid extending to 50 MOA below center — drop lines at every 5 MOA interval widen progressively from 10 MOA to 40 MOA, giving quick wind holds without cluttering the field of view at lower magnifications. First focal plane keeps all subtensions accurate across the full 4-20× range.

Key Features

• 30mm one-piece tube with 100 MOA elevation travel — generous adjustment range for a 30mm platform, with 80 MOA of windage and 25 MOA per revolution for fast dialing
• Locking turrets with precision zero stop — pull up to dial, push down to lock. The zero stop returns you to your confirmed zero with a hard, repeatable stop
• Advanced fully multi-coated optics with XPL coating — AFMC lenses deliver high light transmission across the spectrum, while the XPL protective layer guards against abrasion and environmental damage
• Argon purged — inert gas purging provides superior fog-proofing and internal moisture resistance compared to nitrogen-filled alternatives
• Illuminated etched glass reticle — variable-brightness red illumination with off positions between each setting, powered by a CR2032 battery
• Side focus parallax adjustment — adjustable from 10 yards to infinity for parallax-free shooting at any distance

Ideal For

PRS and long-range competition shooters running lighter rifle builds who prefer MOA adjustments and want a capable FFP scope without the weight penalty of a 56mm objective — at 27.6 oz, the 4-20×50 saves nearly half a pound over its 6-24×56 sibling while keeping 100 MOA of usable elevation.

Hunters who also shoot precision and want one scope that crosses over — the 4× low end provides a wider field of view (27.9 ft at 100 yards) for timber and brush work, while locking turrets prevent bump-induced zero loss in the field.

Rimfire and air rifle competitors looking for a precision optic with 10-yard minimum parallax — the side focus adjustment goes low enough for close-range benchrest disciplines without compromise at distance.