PROOF 134559 6CM 20″ 7.5TW 4GRV CF

The 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!

Proof Research 134559 Bolt Action Barrel Pre-Fit 6mm Creedmoor 20″ 1:7.50″ Twist (4 Groove), 5/8″-24 tpi Threaded, Carbon Fiber, Drop-In Design for Sig Cross