Athlon Argos Btr Gen 1 Vs Gen 2, I've had seen and read the reviews that were available and I was impressed. However, are there any I'm pretty sure the difference between the two generation of scope is the tube diameter. For an optic with these specs in the $300 range it seems pretty good but wouldn’t mind getting some After 1,000+ rounds through my 6. Two years ago, I needed a reliable precision scope for my training rifle—something that could Athlon Optics Argos BTR Gen 2 Rifle Scope List price was $429. 2 mil sub-tensions. The Helos BTR GEN2 is the exception. Tracks perfectly and looks (glass wise) as good as a $1400 optic for <1/3rd the price. Im new to the mid-long range shooting world (200-600 yards). they sent me a new one . 5-27x50 MIL Gen1 for $800 CAD.