Includes both threaded & compensated factory barrels. The can be changed out in seconds. Night sights, optic plate adapters, Surefire XC1b light & a paddle holster that will accommodate it in both configurations with the light. Also has 2 17 round magazine adapters & 2 24 round adapters. The only magazine included is a single 15 rounder. I can't find the 12 rounder atm. $950 cash. 417-425-5587 text only. Thank you.