Best price
$409.99at OpticsPlanet
Out of stock Sale checked Oct 22, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet Best price | $409.99Salechecked Oct 22, 2026 | Out of stock | Buy at OpticsPlanet | |
| Brownells | $417.99checked Oct 22, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Oct 17, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $417.99 | $417.99 | $417.99 |
| OpticsPlanet | $409.99 | $409.99 | $409.99 |
Since Oct 17, 2026.
About this part
The CMMG .45ACP Barrel and BCG Kit 5in 4140CM SBN Black is a 5" .45 ACP barrel from CMMG. It's sold by 2 stores, from $409.99 to $417.99.
Fits and works with
- Caliber
- .45 ACP · Shop matching ammo
- Bolt
- .45 ACP · Bolt carrier groups
- Barrel length
- 5" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Black
- Platform
- AR-9
- Caliber
- .45 ACP
- Barrel length
- 5"
From the manufacturer
CMMG .45ACP Barrel and BCG Kit 5in 4140CM SBN Black. Unlike typical direct blowback systems our 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. MkG Barrel and Bolt Kits are designed to work exclusively with our MkG Lowers. Other manufacturers receivers may work but they cannot guarantee function or reliability. Specifications for CMMG .45ACP 5in Barrel and BCG Kit: Manufacturer: CMMG Color: Black Finish: Matte Fabric/Material: 4140CM Caliber: .45 ACP Barrel Length: 5 in Barrel Profile: Medium Taper Barrel Twist Rate: 1-16 Flutes: No Gun Make: AR Platform Gun Model: AR-15 Weight: 1.6 lb Additional Features: Threaded Condition: New Firearms Threads Per Inch: .578x28 Dimensions: 1.90 X 1.95 X 14.75 in Package Contents: CMMG .45ACP 5in Barrel and BCG Kit What firearm models does the manufacturer say CMMG .45ACP 5in Barrel and BCG Kit is compatible with? The manufacturer suggests that CMMG .45ACP 5in Barrel and BCG Kit is compatible with AR-15CMMG 45D69FA: .45ACP Barrel and BCG Kit 5in 4140CM SBN Black
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