This is a BSA Optics Rifle Scope known as the Tactical Weapon, model TW-312X40W1PMTB.
The Tactical Weapon Series scopes are engineered specifically for use with tactical style firearms. Select Tactical Weapon models offer one-piece weaver mounts" AR handle mounts" or AR & SKS mounts and rings.
Features:
MAGNIFICATION LOW: 3X
MAGNIFICATION HIGH: 12X
OBJECTIVE LENS DIA. (MM): 40
ADJUSTMENT GRADUATION (MOA): 1/4
LENS COATING: Fully Coated
W/E ADJUSTMENT RANGE: 35
EYE RELIEF (INCHES): 4
FOV LOW @ 100' (FT): 40
FOV HIGH @ 100' (FT): 10
PARALLAX SETTING (YDS): 10 to Inf.