JMAC CUSTOMS LLC NOW SUPPORTING 9MM WITH NEW MUZZLE BRAKE IN POPULAR THREAD PITCHES
JMac Customs LLC announced the roll out of their RRD-4C Slim “9” muzzle brake for 9mm in 1/2x28tpi and 14mm-LH tpi. Machined from solid 17-4ph stainless steel barstock the RRD-4c…