B5 Systems vs CMMG: AR-15 brands compared
CMMG leads in 3 of 6 categories.
B5 Systems for pistol grips and stocks. CMMG for receivers and internals.
From tens of thousands of real builds and live prices at 30+ retailers.
Our take
B5 Systems makes AR stocks, grips and handguards, mainly the SOPMOD and Bravo stocks the US military buys, plus the Type 22 P-Grip.
Mil-spec buffer tube fit · SOPMOD stocks · Limited lifetime warranty
- Close to average prices
- The more popular pick: in 14% of builds
- Pistol grips, picked 10x as often
- Stocks, picked 35x 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
- Receivers (B5 Systems receivers are rarely picked)
- Internals (B5 Systems internals are rarely picked)
Many builders mix them: 16% of CMMG builds add B5 Systems, most often the pistol grip.
Biggest differences
"Picked" is the share of builds with that part that chose each brand.
| B5 Systems | CMMG | Difference | |
|---|---|---|---|
| Price vs average | 11% cheaper | 8% cheaper | |
| Share of builds | 14% | 9% | B5 Systems 1.6x |
| Stocks picked | 11% | 0.3% | B5 Systems 38x |
| Grips picked | 21% | 2.0% | B5 Systems 10x |
| Parts listed | 205 | 1,054 | CMMG 5x |
| Retailers carrying | 15 | 21 | CMMG 1.4x |
Price: Tie
For the same part, B5 Systems parts run 11% cheaper than average and CMMG parts run 8% cheaper than average.
Builder favorite: B5 Systems wins
B5 Systems is in 14% of builds and CMMG is in 9% of builds.
Receivers: CMMG wins
CMMG upper receivers picked often, B5 Systems rarely.
Most picked B5 Systems receivers
Rarely picked
Internals: CMMG wins
CMMG triggers picked often, B5 Systems 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.
Most picked B5 Systems internals
Rarely picked
Furniture: B5 Systems wins
Builders pick B5 Systems stocks (35x) and pistol grips (10x) more often than CMMG. CMMG handguards are picked often, B5 Systems's rarely.
Why B5 Systems: The B5 Bravo stock fits mil-spec carbine tubes and uses steel hardware and steel anti-rotation QD sling mounts.
Shopper clicks: CMMG wins
Of recent clicks through to a store for these brands, 91% went to CMMG and 9% went to B5 Systems.
The full record
Everything we track for B5 Systems vs CMMG, from builds, store listings and daily prices.
| B5 Systems | CMMG | |
|---|---|---|
| Share of builds | 14% | 9% |
| Price tier | Mid priced | Mid priced |
| Parts listed | 205 | 1,054 |
| Part types | 7 | 30 |
| Retailers carrying | 15 | 21 |
| In stock now | 81% | 49% |
| Price change, 90 dayson the most picked parts | Flat | 2% higher |
| On sale now | None | None |
