1/12 twist cz457 barrel 1.1" diameter 24.5" long. 11 degree crown, carbon wrapped for rigidity not weight. Barrel is 5 pounds. Shoots 3/8 inch or better groups with Sk/ Lapua ammo. Made by B2P gunsmithing in Spanish Fork, Ut. Competition match barrel, match chambered. I will not respond to "is this available?" I will assume you're a scam and block you