[mav359]

Wondering if anyone here has used a PK-AS, and if so, is the eye relief unlimited as it is on other red dots?

[Sprout47]

They do have eye relief. 120mm, according to Kalinka's. PK-01 might be a better option, looks like an Aimpoint Comp ml3, or (the one I would go with) the PK-A which has unlimited relief.

PK-01: PK-01 Military Red Dot Rifle Weapon Scope w/ Brightness Adjustment, Detachable AK Side Rail and Standard 30 mm Tube - Kalinka Optics Warehouse®
PK-A: PK-A Military Fast Acquisition Red Dot Rifle Scope, SKS/SVD Version - Kalinka Optics Warehouse®