Rosco Manufacturing vs CMMG: AR-15 brands compared
CMMG leads in 5 of 6 categories.
Rosco Manufacturing for the price and barrels. CMMG for bolt carrier groups, receivers and furniture.
From tens of thousands of real builds and live prices at 30+ retailers.
Our take
Rosco makes US made, button rifled barrels in Rhode Island, mostly as an OEM for other gun companies. The Bloodline and Purebred lines are the ones sold under its own name.
OEM barrel maker · Button rifled · In-house barrel blanks
- Spending less: about 29% below average
- Barrels, picked 7x as often
CMMG makes complete AR rifles, pistols and parts, and it's known for Radial Delayed Blowback, its action for pistol caliber ARs in rounds like 10mm and .45 ACP.
Lifetime quality guarantee · Radial Delayed Blowback · Pistol caliber ARs
- Close to average prices
- The more popular pick: in 9% of builds
- Bolt carrier groups, picked 6x as often
- Receivers (Rosco Manufacturing receivers are rarely picked)
Many builders mix them: 11% of Rosco Manufacturing builds add CMMG, most often the trigger.
Biggest differences
"Picked" is the share of builds with that part that chose each brand.
| Rosco Manufacturing | CMMG | Difference | |
|---|---|---|---|
| Price vs average | 29% cheaper | 8% cheaper | Rosco Manufacturing cheaper |
| Share of builds | 4% | 9% | CMMG 2.3x |
| Parts listed | 145 | 1,055 | CMMG 7x |
| Barrels picked | 14% | 2.2% | Rosco Manufacturing 7x |
| Retailers carrying | 13 | 22 | CMMG 1.7x |
Price: Rosco Manufacturing wins
For the same part, Rosco Manufacturing parts run 29% cheaper than average and CMMG parts run 8% cheaper than average.
Builder favorite: CMMG wins
Rosco Manufacturing is in 4% of builds and CMMG is in 9% of builds.
Why CMMG: Every CMMG product carries a Lifetime Quality Guarantee against defects in material or workmanship.
Receivers: CMMG wins
CMMG upper receivers picked often, Rosco Manufacturing rarely.
Most picked Rosco Manufacturing receivers
Rarely picked
Internals: CMMG wins
Builders pick Rosco Manufacturing barrels (7x) more often than CMMG. Builders pick CMMG bolt carrier groups (6x) more often than Rosco Manufacturing. CMMG charging handles, triggers and muzzle devices are picked often, Rosco Manufacturing's rarely.
Why CMMG: In a Radial Delayed Blowback gun the bolt has to rotate and unlock before it cycles, which slows the carrier enough to run safely.
Furniture: CMMG wins
CMMG pistol grips picked often, Rosco Manufacturing rarely.
Most picked Rosco Manufacturing furniture
Rarely picked
Shopper clicks: CMMG wins
Of recent clicks through to a store for these brands, 93% went to CMMG and 7% went to Rosco Manufacturing.
The full record
Everything we track for Rosco Manufacturing vs CMMG, from builds, store listings and daily prices.
| Rosco Manufacturing | CMMG | |
|---|---|---|
| Share of builds | 4% | 9% |
| Price tier | Budget friendly | Mid priced |
| Parts listed | 145 | 1,055 |
| Part types | 8 | 31 |
| Retailers carrying | 13 | 22 |
| In stock now | 42% | 49% |
| Price change, 90 dayson the most picked parts | Flat | 5% higher |
| On sale now | None | None |
