Proof Research 134559 Bolt Action Barrel Pre-Fit 6mm Creedmoor 18" Threaded Carbon Fiber Fits Sig Cross
https://www.tandktactical.com/shop/843068134559-proof-research-134559-bolt-action-barrel-pre-fit-6mm-creedmoor-18-threaded-carbon-fiber-fits-sig-cross-37643
https://www.tandktactical.com/web/image/product.template/37643/image_1920?unique=0734015
The times of sending off your Sig Cross to have the barrel changed is over with Proof's drop-in barrel design.
