Proof Research 134573 Bolt Action Barrel Pre-Fit 6mm Creedmoor 20" 1:7.50" Twist (5 Groove), 5/8"-24 tpi Threaded, Stainless Steel, Drop-In Design for Sig Cross

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!