Description

AIM7 ASR Brake ANVIL Series
(1.1/8×12, Steel) 1/2 X 28 TPI

The AIM7 Gsh-0.28t ASR Muzzle Brake is a 1/2×28 threaded muzzle device engineered for compatibility with the SilencerCo ASR (Active Spring Retention) mounting system. It enables quick and secure attachment or removal of ASR-compatible suppressors, providing shooters with greater flexibility and convenience.

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🔧 Key Features

• Thread Pitch: 1/2×28— ideal for larger calibers such a
• ASR Mount Compatible: Works seamlessly with SilencerCo’s ASR mounting system for fast, reliable suppressor installation.
• Material: Made from SUS303 stainless steel, valued for its corrosion resistance, machinability, and durability.
• Dimensions:
  • Overall length: ~2.18″
  • Outside thread pitch (for ASR mount collar): 1-1/8×12
  • Bore size: 0.46″ — ensure it is appropriate for your caliber.
  • Weight: 4.8oz
• Compatible with the following SilencerCo ASR mounting systems:
  • Alpha: Harvester 300 and Omega K Series, and Octane Series
  • Bravo: Harvester EVO, Hybrid 46, Harvester 338, Omega 300, and Scythe-Ti
  • Charlie: Saker ASR Series, Chimera 300, Omega 36M, and Hybrid 46M

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⚠️ Important Notes

✅ Caliber Matching:
Always verify that the bore diameter of the muzzle brake is appropriate for your firearm’s caliber.

✅ Suppressor Mounting:
Check that your suppressor is designed for use with a 1/2×28 threaded barrel and is compatible with the ASR mounting system.

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🔍 Material Overview: SUS303 Stainless Steel

This muzzle brake is manufactured from SUS303 (equivalent to AISI 303), an austenitic stainless steel known for its ease of machining and corrosion resistance.

Property	Description
Composition	Fe, 17–19% Cr, 8–10% Ni, ~0.15% S, ~1% Mn
Machinability	Excellent (better than SUS304)
Corrosion Resistance	Good, slightly lower than SUS304
Tensile Strength	Moderate (500–750 MPa)
Weldability	Poor (due to sulfur content)
Magnetism	Non-magnetic (annealed condition)

SUS303 is a good choice for civilian semi-automatic rifles and moderate use, but it is not intended for extreme military-grade abuse.

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⭐ Summary

The AIM7 Gsh-0.58t ASR Muzzle Brake offers solid recoil reduction, suppressor compatibility, and reliable performance at a reasonable price point. Its ASR system integration makes it ideal for shooters who want to switch between suppressed and unsuppressed configurations quickly and securely.