T'n T Triebel tuning/part for long gun gas nozzle, adjustable for H&K MR223

The use of silencers on semi-automatic rifles affects the cycling function, as the gas pressure curve is altered. With the adjustable gas nozzle for Heckler&Koch MR223, the semi-automatic function is ensured for use with a silencer by regulating the amount of escaping gases. Installation by a skilled professional is required. Installation takes no less than 45 minutes of work time. The gas extraction is adjustable in 5 positions. Position N: Normal operation without silencer Position SD: Silencer operation Position 1: When there is an over-function at Position SD Position 2: When there is an over-function at Position 1 Position N+: For operation with subsonic ammunition or when the weapon has a malfunction in Position N The adjustable gas extraction is supplied including 2 tension pins and operating instructions.