I have a gently used PA M4-72 muzzle brake. Works great. Approx 100 rnds thru it. There is little bit of scuffing from installation.
Precision Armament M4 - 72 Severe-Duty Compensator - .223cal - 1/2x28 - $60 shipped OBO
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Maximum Recoil Reduction in a Compact, Rugged Design.
Features an innovative reverse venting triple baffle design for the highest recoil reduction in its class. The M4-72 is an extremely lightweight (2.6 oz) and compact design that delivers industry leading recoil reduction of up to 75%. Closed bottom construction combined with upward biased venting effectively eliminates both muzzle rise and dust signature. Precision machined from heat treated stainless steel for superior durability, the M4-72 can withstand the extreme heat of combat conditions without being subject to rapid erosion. Available with an advanced Ionbond® high temperature CrCN coating (matte black), or stainless steel in-the-white (satin grey). Accu-Washer™ Muzzle Alignment System required for installation.
.223/5.56mm model is designed to fit M4/M16/AR15 style rifles and features 1/2-28 threads. Delivers industry leading recoil reduction of 73-75% for standard 223 Remington. Will accept many devices designed to fit over the standard A2 flash suppressor.
Product Specifications
Material: HTSR 416 stainless steel bar, HRC 26-32
Finish: Ionbond® CrCN matte black – or – Stainless steel matte finish
.223 Caliber / 5.56mm
Thread: 1/2-28 TPI
Length: 2.250?
Diameter: 0.865?
Weight: 2.6 oz.