LanTac USA LLC, Stingray Nonlinear Compensator, 1/2-28 Thread Pitch, Stainless Steel, Silver NEW Caliber: .223/ 5.56mm Material: AISI4140, Hardened 48-52Rc Thread: 1/2-28 UNEF R/H Comes with crush washer for correct timing of the device Product Description The Stingray Non Linear Compensator handles gas flow differently to standard Linear Compensators. The STG556C-BLK features a series of porting channels that run both parallel and vertical with and to the bore. The parallel channels also feature a series of gas expansion chambers along their length.