Best price
$450.99at Brownells
Out of stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $450.99checked Oct 1, 2026 | Out of stock | Buy at Brownells | |
| OpticsPlanet | $469.99Salechecked Oct 1, 2026 | Out of stock | Buy at OpticsPlanet |
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 Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $450.99 | $450.99 | $450.99 |
| OpticsPlanet | $469.99 | $469.99 | $469.99 |
Since Sep 28, 2026.
About this part
The MKG Guard Barrel & BCG Kit 16" 9mm is a 16" 9mm barrel from CMMG with a carbine gas system. It's sold by 2 stores, from $450.99 to $469.99.
Fits and works with
- Caliber
- 9mm · Shop matching ammo
- Bolt
- 9mm · Bolt carrier groups
- Gas system
- Carbine · Handguards
- Barrel length
- 16" · Handguards
Specifications
- Manufacturer
- CMMG
- Platform
- AR-9
- Caliber
- 9mm
- Gas system
- Carbine
- Barrel length
- 16"
From the manufacturer
The CMMG MkG GUARD Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using their Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, the 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. The MkG GUARD Barrel and Bolt Kits are designed to work exclusively with the CMMG MkG GUARD Lowers, and a mil-spec upper receiver with enlarged ejection port. Other manufacturers' receivers may work, but we cannot guarantee function or reliability. 16a ^2 Medium Taper 1:10 Twist 4140 Chrome M Mfg: Cmmg
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