Proof Research 134467 Bolt Action Barrel Pre-Fit 308 Win 16" 1:10" Twist (5 Groove), 5/8"-24 tpi Threaded, Carbon Fiber, Drop-In Design for Sig Cross Scopes It's completely rubberized

It's completely rubberized

providing more than enough torque required to complete any AR-15/LR308 build function with precision and confidence

No shell holders required

Thinsulate C-40 gram

A teardrop shape extension tube cheek weld shape assists in a natural sight picture with bead type or barrel mounted sights

Proof Research 134467 Bolt Action Barrel Pre-Fit 308 Win 16" 1:10" Twist (5 Groove), 5/8"-24 tpi Threaded, Carbon Fiber, Drop-In Design for Sig Cross Scopes It's completely rubberizedThe times of sending off your Sig Cross to have the barrel changed is over with Proof's drop in barrel Design! Stand alone and guaranteed to headspace is achievable at your own home with no gunsmith required!