Proof Research 138960 Bolt Action Barrel Pre-Fit 260 Rem 20" 1:8" Twist (5 Groove), 5/8"-24 tpi Threaded, Stainless Steel, Drop-In Design for Sig Cross Dummy Rounds It uses a metal spin

It uses a metal spin plate

four colored spline drive breech lock bushings

the Sightmark Core Shot A-Spec LQD Reflex Sight

The American Rail Adapter Stud 6A is for for American size rails

Targets designed to help improve your accuracy and confidence for when you need it most

Proof Research 138960 Bolt Action Barrel Pre-Fit 260 Rem 20" 1:8" Twist (5 Groove), 5/8"-24 tpi Threaded, Stainless Steel, Drop-In Design for Sig Cross Dummy Rounds It uses a metal spinThe 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!