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Questions & Answers
Is the barrel proprietary for this setup like the bcg? or can I swap out the barrel. Expert Answer

The CMMG 10mm Barrel And Bcg Kit is designed to work exclusively with CMMG Mk10 Lower Receivers. You can use any AR pattern barrel; however, you must ensure you have the CMMG BCG with the correct bolt for the caliber you intend to use, as well as a MK10 lower receiver.

by Ethan, Gear Expert, February 28, 2023
Will this be able to shoot S&W .40 cal ? Expert Answer

The CMMG 10mm Barrel and Bcg Kit is chambered in 10mm. I would not recommend using .40 S&W as the manufacturer does not state if it would be safe to do so.

by Ethan, Gear Expert, October 14, 2022
Customer Reviews
Most Recent Reviews So much better than blowback!!! by mattman1976, Verified Owner, June 25, 2025
This combo is definitely worth the extra $. I had a 10mm and 45 acp blowback, I sold both after trying a cmmg in 45 acp! No more heavy buffer spring, no more 12oz buffer! My 10mm went from my heaviest to my lightest!
Read 1 Review
Color: Black Finish: No Caliber: 10mm Auto Barrel Length: 8 inBarrel Profile: Medium Taper Threads per Inch: .578x28 Barrel Twist Rate: 1-16 Flutes: No Weight: 2.1 lb

Code: 2CM-ATB-CP7-10D424E

MPN: 10D424E

UPC: 816422028689

List: $474.95Save $44.96
$429.99

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Product Info for CMMG 10mm Barrel And Bcg Kit

CMMG Mk10 Barrel and BCG Kits allow you to build a Pistol Caliber Carbine using our Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, our RDB uses a bolt that is forced to rotate, slowing the BCG. This results in a lighter BCG for a lighter rifle, and less felt recoil than a straight blowback system.image

WARNING: California`s Proposition 65

Specifications for CMMG 10mm Barrel And Bcg Kit:

Manufacturer: CMMG
Color: Black
Finish: No
Fabric/Material: 4140CM
Caliber: 10mm Auto
Barrel Length: 8 in
Barrel Profile: Medium Taper
Threads per Inch: .578x28
Barrel Twist Rate: 1-16
Flutes: No
Weight: 2.1 lb

Package Contents:

  • CMMG 10mm Barrel And Bcg Kit

CMMG 10mm Barrel And Bcg Kit Orderable Models

List of Orderable Models

CMMG Barrel and BCG Kit, 8in, 4140CM, SBN, 10MM, 10D424E , MPN: 10D424E , UPC: 816422028689 , Code: 2CM-ATB-CP7-10D424E
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