True precision sig p320c bbl threaded gold tin
Broach cut 6 groove rifling
Include Viton high heat integral O-ring lock thread protector
Advanced proprietary broach cut design specifically
Made in the U.S.A
Other Features: 416r stainless billet, 11 degree target crown, match grade drop in barrel, 1:10lh twist, 1/2×28 threads with thread protector.Improved and widened feed ramp over oem for more reliable feeding of hollow-point and defensive ammunition.