CMMG AR-15 Bolt Catch Assembly

The CMMG AR-15 Bolt Catch Assembly (part no. 55AFF34) is a complete replacement bolt catch built for standard AR-15 mil-spec lower receivers. CMMG machines the catch from steel for long-term durability, and because it’s sold as a full assembly, you’re not stuck sourcing the small roll pin or spring separately if your factory catch wears out or breaks. It’s a straightforward parts-bin fix for a part that takes real abuse every time the bolt locks back.

Key Specifications

• Sold as a complete assembly, so no separate roll pin or spring sourcing is needed.
• Machined from steel for durability under repeated bolt-lock cycles.
• Direct fit for standard AR-15 mil-spec lower receivers.
• Catches and holds the bolt carrier group open after the last round fires, the core function of the part.
• A straightforward drop-in swap for a worn or broken factory bolt catch.

Frequently Asked Questions

What does this assembly include? The complete bolt catch, not just the lever, so no separate small parts are needed.

What lowers does this fit? Standard AR-15 mil-spec lower receivers.

What is the bolt catch made from? Steel, for durability under repeated use.

Buy the CMMG AR-15 Bolt Catch Assembly

A worn or broken bolt catch is an easy fix when the replacement is a complete assembly instead of a loose pile of small parts. Order it from our Lubbock, Texas gun shop for fast shipping, along with more AR-15 bolt catch and release parts.