SilencerCo ASR Muzzle Brake | .223/5.56 | 1/2×28 | AC142

The SilencerCo ASR Muzzle Brake AC142 is a 3-port muzzle device designed for use with SilencerCo ASR mounts on rifles chambered for .223 Rem / 5.56 NATO with 1/2×28 threads. It provides rapid, one-hand-on/one-hand-off attachment and removal to compatible ASR silencers and mounts. Each unit ships with a shim set and Rocksett for straightforward installation. The device is intended for range use and competition shooting where fast suppressor attachment and consistent muzzle control are important.

Product Specifications

• The product type is Muzzle Brake.
• The model is listed as ASR.
• The manufacturer part number is AC142.
• The thread pattern is 1/2×28.
• The NFA thread pattern is 1/2×28.
• The size/caliber is .223 Rem / 5.56 NATO.
• The material is specified as Steel.
• The finish is Black.
• The device uses a 3-port design to help reduce felt recoil and muzzle climb.
• The brake is compatible with SilencerCo ASR Mounts and select ASR-compatible series.
• The brake allows one-hand-on, one-hand-off attachment and detachment to ASR mounts.
• Each unit includes a shim set and Rocksett for installation.
• The listed weight is 0.25.
• The package dimensions are 6.6 x 4.6 x 1.1 (as provided by source).
• The UPC is 817272010336.

The ASR Muzzle Brake AC142 is a durable, straightforward option for shooters who use ASR-compatible mounts and want fast, repeatable attachment for suppressors. Its compact, three-port layout and included installation hardware make it practical for serious range work and competition use where quick transitions and consistent muzzle behavior matter.

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