CMMG Barrel and Bolt Group Kit 4.5inch MT 4140CM 22LR
$259.80
Transform your existing upper into a dedicated .22LR platform with the CMMG Barrel and Bolt Group Kit. Featuring a 4.5″ medium taper profile and constructed from durable 4140 chrome moly with a salt bath nitride finish, this kit is ready for precision shooting with a 1:16 twist and threaded 1/2-28 for added versatility. Just add a magazine and experience the fun and economy of .22LR shooting.
Out of stock
Everything you need to convert your existing upper to a dedicated .22LR. Just purchase a magazine and you are ready to go.
- 4.5″
- Medium Taper Profile
- 4140 Chrome Moly
- Salt Bath Nitride Finish inside and out
- 1:16 Twist
- 22LR Sprorting Chamber
- Threaded 1/2-28
| Weight | 1.185 lbs |
|---|---|
| Dimensions | 11.250 × 2.000 × 2.000 in |
| Manufacturer | Cmmg Inc. |
| Barrel Length | 4.5 inches |
| Finish | Salt Bath Nitride |
| Frame Material | 4140 Chrome Moly |
| Twist Rate | 1:16 |
| Thread Pattern | 1/2-28 |
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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