Mkg Complete Bolt Carrier Group Repair Kit .45Acp

The CMMG Complete Bolt Carrier Group Repair Kit for .45 ACP gives you a straightforward way to source OEM replacement parts for your AR platform pistol. Whether you're a competitive shooter, recreational plinker, or someone who runs a .45 ACP AR build for home defense, having access to quality BCG components means you can keep your gun running without waiting on backorders or settling for unknown-brand parts. This kit bundles the high-wear and consumable pieces you're most likely to need in one place.

CMMG engineered these parts to work together as a complete system. If you've put rounds downrange, you know that bolt carrier groups take a beating—the firing pin wears, springs lose tension, and extractors take a set. Rather than hunt down each piece separately, this kit covers the main wear items and critical components. The inclusion of both the bolt and the carrier key means you have flexibility to address major or minor repairs without buying partial kits.

This is the kind of practical gear that separates casual shooters from people who take their maintenance seriously. Keep one in your range bag, your cleaning station, or your armorer's toolkit. For anyone who runs a .45 ACP AR pistol—or is planning to build one—having a complete repair kit on hand is smart planning.

What's Included

• Bolt (.45 ACP)
• Firing pin
• Firing pin retainer pin
• Bolt carrier key (RDB)
• Key screws (qty. 2)
• Bolt cam pin
• Extractor
• Ejector
• Ejector spring
• Bolt spring (RDB)

Frequently Asked Questions

Is this kit compatible with my .45 ACP AR pistol?

Yes. This CMMG bolt carrier group repair kit is designed for .45 ACP AR platform pistols. Verify that your upper receiver is chambered in .45 ACP before ordering.

Can I use individual parts from this kit, or do I need to install them all at once?

The kit is designed so you can use individual components as needed. Install what you need now and save the rest for future repairs or replacements.

Do I need any special tools to install these parts?

Basic AR armorer tools (punch set, screwdriver, springs tool) are helpful for installation. Refer to your rifle's manual or a gunsmith for proper assembly guidance if you're unfamiliar with BCG work.

What's included in the kit?

The kit includes a complete bolt, firing pin and retainer, carrier key with screws, cam pin, extractor, ejector with spring, and bolt spring—essentially all the internal and wear-critical parts of a bolt carrier group assembly.