CMMG 16" Barrel and BCG Kit 4140CM SBN 9mm Luger
$464.79
Complete your 9mm AR-15 build with CMMG’s 16″ barrel and BCG kit. Features a 4140 Chrome Moly barrel with Salt Bath Nitride finish and Radial Delayed Blowback BCG.
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SKU:
cssi-dd-CA99DE642
Category: Gun Parts
Description
Features:
- 16? Medium Taper
- 1:10 Twist
- 4140 Chrome Moly
- Salt Bath Nitride Finish inside and out
- 9×19 NATO Chamber
- Threaded 1/2-28
- Radial Delayed Blowback Bolt (Patent Pending)
- Requires enlarged ejection port for reliable operation.
- Weight: 2.5lbs
Additional information
| Weight | 2.750 lbs |
|---|---|
| Dimensions | 24.000 × 2.000 × 1.500 in |
| Manufacturer | Cmmg Inc. |
| Caliber | 9mm Luger |
| Barrel Length | 16 |
| Finish | Salt Bath Nitride |
| Weight | 2.5lbs |
| Twist Rate | 1:10 |
| Thread Pattern | 1/2-28 |
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Shipping and Delivery
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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