The CMMG A2 Compensator in 1/2×28 for AR-15 rifles (CMMG part no. 55DA5EB) is the mil-spec A2 flash hider that most 5.56x45mm barrels are threaded for. CMMG lists it for 5.56x45mm and sells it without a crush washer, with a separate kit offered that includes one. It is the classic birdcage-style muzzle device and a simple way to replace a lost or damaged factory piece on a standard barrel. Every CMMG product is covered by a Lifetime Quality Guarantee.

Key Specifications

• The thread is 1/2×28, the standard muzzle thread on 5.56x45mm AR-15 barrels.
• The cartridge is 5.56x45mm, the chambering CMMG lists this muzzle device for.
• The design is a mil-spec A2 flash hider, the original birdcage style used on military rifles.
• It does not include a crush washer, so plan on a 1/2-inch crush washer to time and secure it.
• CMMG covers its products with a Lifetime Quality Guarantee.

Frequently Asked Questions

Does it come with a crush washer? No. CMMG sells this compensator without a crush washer, and also offers an A2 flash hider kit that includes one.

What thread does it use? It uses a 1/2×28 thread, the standard muzzle thread for 5.56x45mm AR-15 barrels.

Is it a compensator or a flash hider? CMMG lists it as the compensator A2 and describes it as a mil-spec A2 flash hider.

Buy the CMMG A2 Compensator, 1/2×28, for AR-15

A standard A2 muzzle device is the cheapest way to restore a stock-look barrel. This one comes from CMMG and carries its lifetime guarantee. Order it with other AR muzzle devices from our Lubbock, Texas gun shop for fast direct shipping.