LanTac USA LLC Stingray Nonlinear Compensator, 1/2-28 Thread Pitch, Stainless Steel, Silver STG556C-SS 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.