This Limite d 12.5" Rosco barrel is designed to bridge the gap between SBR-Pistol and/ or RECCE platforms and delivers amazing precision performance for its compact size. It is the perfect addition for the person attempting to create the ultimate intermediate patrol platform. This barrel was designed and ported for dedicated suppressor use. While the barrel will function without a suppressor, it may not be optimal and will require lighter buffers, springs, or a combination of both. Barrel Length 12.5" Barrel Weight 22.25oz Barrel Material 4150 CMV Barrel Caliber .223 Wylde Barrel Profile Government Twist 1/8 Barrel Thread 1/2 x 28 Gas Block Size .750 Gas System Length Mid-Length (Suppressor Optimized Gas Port) Barrel Crown 11 Degree Barrel Finish Nitride Barrel Extension Finish Nitride