We have a couple of the brand new version of the B&T 3-Lug QD SMG suppressors. These will fit any standard H&K 3-Lug muzzle as well as the 3-Lug on the B&T APC9 & GHM9.
These suppressors lock up tight to the muzzle via a ratchet element on the body of the tube to eliminate any movement and reduce point of Impact shift. Out of all the 3-lug silencers I've used, this and the previous version of this can showed the least point of impact shift.
All B&T suppressors I've ever handled have been made to an exceptional standard of fit and finish.
Brand New B&T 3-Lug RQD - $750