Does the CMMG 12.5" .300 1:7 Pistol Length work with the Rosco Manufacturing 5.56/300BLK?
Barrel
CMMG 12.5" .300 1:7 Pistol Length Multi-Role
from $179.95
Bolt Carrier Group
Rosco Manufacturing 5.56/300BLK
from $144.00
CMMG barrel and Rosco Manufacturing bolt carrier group compatibility
Yes, they fit
The CMMG 12.5" .300 1:7 Pistol Length Multi-Role works with the Rosco Manufacturing 5.56/300BLK. Our compatibility rules found no conflict between them.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the CMMG barrel and Rosco Manufacturing bolt carrier group
Backed by thousands of qualified builds that have both a barrel and a bolt carrier group.
Share of builds with the Rosco Manufacturing 5.56/300BLK and any barrel
CMMG 12.5" .300 1:7 Pistol Length
Not in enough builds yet to report.
Rosco Manufacturing 5.56/300BLK
- Of bolt carrier group picks
- 0%
- Median paid
- $144
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the CMMG barrel and Rosco Manufacturing bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle
Upper Receiver
Stock & Brace
Lower Receiver
Suppressor
Muzzle Device
Fits, check note
Pistol Grip
CMMG 12.5" .300 1:7 Pistol vs Rosco Manufacturing: specs and prices
| CMMG 12.5" .300 1:7 Pistol | Rosco Manufacturing | |
|---|---|---|
| Best price | $179.95 at AR15 Discounts | $159.00 at BattleHawk Armory |
| Stores | 2 of 2 in stock | 4 of 5 in stock |
| Caliber | 300 Blackout | n/a |
| Gas System | Pistol | n/a |
| Length | 12.5 | n/a |
| Twist | 1:7 | n/a |
| Thread | 5/8x24 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Finish | n/a | Phosphate |
Both for $338.95 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Price history, last 90 days
- CMMG 12.5" .300 1:7 Pistol Length: lowest $179.95 on Jul 5, highest $179.95 on Jul 5 over the last 90 days.
- Rosco Manufacturing 5.56/300BLK: lowest $144.00 on Jul 5, highest $174.99 on Sep 9 over the last 90 days.
Bolt Carrier Groups most paired with CMMG barrels
The CMMG 12.5" .300 1:7 Pistol Length is not in enough builds yet, so these are the most picked next to any CMMG barrel. Only parts our rules say fit the CMMG 12.5" .300 1:7 Pistol Length are listed.
Barrels frequently paired with the Rosco Manufacturing 5.56/300BLK
Most picked next to it in real builds. Only parts our rules say fit the Rosco Manufacturing 5.56/300BLK are listed.
