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Mfg Item #: 99DE642
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CMMG's 9mm Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using CMMG's Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, RDB uses a bolt that is forced to rotate and unlock, slowing the BCG. This results in a lighter BCG for a lighter rifle, and less felt recoil than a straight blowback system. Their Barrel and Bolt Kits are designed to work exclusively with mil-spec AR-15 upper receivers with a modified ejection port, like their MkG/MkGs upper, and most mil-spec AR15 lowers when used with 9 AR Conversion mags as well as their MkGs Mk17 and Mk9* lowers. Other manufacturers receivers may work, but we cannot guarantee function or reliability.*Older Mk9 lowers will require one of their retrofit kits to convert it to a Radial Delayed Blowback compatible lower, instead of Traditional Blowback.
| Model | Replacement Barrel |
|---|---|
| Twist | 1:10" |
| Finish | Salt Bath Nitride |
| Length | 16.10" |
| Series | Kit |
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Compliance with Local Laws: You are solely responsible for ensuring that any items you purchase are legal to possess, transfer, or purchase in your jurisdiction. This includes, but is not limited to, compliance with state and local laws such as Colorado’s 15-round magazine capacity limit and age requirements. It is your responsibility to verify that the products you are ordering meet all legal requirements before purchasing.
Restocking Fee for Non-Compliance: If your purchase cannot be legally shipped to your location due to non-compliance with local laws, a 10% restocking fee will be applied to your refund. This includes, but is not limited to, situations where you fail to meet the age requirements or laws restricting certain items (e.g., magazine capacity, firearms, ammunition).
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For customers purchasing in Colorado, please be aware that state law (Colo. Rev. Stat. § 18-12-302) prohibits the sale, transfer, or possession of large-capacity magazines exceeding 15 rounds of ammunition, with limited exceptions. To ensure compliance, we will block any magazine exceeding this capacity to limit it to 15 rounds. A fee of $15 will be charged for blocking up to 5 magazines per order. This fee covers the modification process to meet Colorado's legal requirements. Please contact us for additional details or if you have questions about your order.