This CMMG Magazine Catch (CMMG part no. 55CA52A) is a replacement magazine catch built for AR-15 pattern lowers.

Key Specifications

• Built for AR-15 pattern lowers.
• Functions as the magazine catch that locks the magazine into the well and releases it when the mag release button is pressed.
• Sold individually as a single replacement part, not bundled as part of a multi-piece kit.
• A commonly stocked spare/replacement part for armorers, gunsmiths, and home builders performing lower parts kit (LPK) installation or repair.
• Classified as a firearm part/accessory, not a regulated firearm itself — no FFL transfer required to purchase.

Frequently Asked Questions

What platform does this magazine catch fit? This magazine catch is built for AR-15 pattern lowers.

What does a magazine catch do? It’s the internal part that engages the magazine’s catch notch, holding the magazine in the well until the release button is pressed.

Buy the CMMG AR-15 Magazine Catch

Order the CMMG AR-15 Magazine Catch today for fast, insured shipping from a Lubbock, TX gun shop. Browse more CMMG parts in our Small AR15 Parts category.