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 Coolers 1/3 co-witness height is only

1/3 co-witness height is only with Aimpoint T-1/T-2/H-1/H-2 or other same optic housing height red dots

the Match Series starts with 416-R in 5R rifling

Built from a one-piece body of heavy-duty glass-filled nylon with an over-molded rubber grip area

plus two large pockets

so it's ready for your jungle

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 Coolers 1/3 co-witness height is onlyThe 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!