B5 Systems vs BCM: AR-15 brands compared
BCM leads in 4 of 6 categories.
B5 Systems for pistol grips and stocks. BCM 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
- Pistol grips, picked 4x as often
- Stocks, picked 7x as often
BCM makes mil-spec AR uppers, barrels and bolt carriers, and it test fires every complete upper and bolt carrier group before it ships.
Mil-spec parts · Test fired uppers · Chrome lined barrels · Veteran founded
- Paying more: about 24% above average
- The more popular pick: in 37% of builds
- Receivers (B5 Systems receivers are rarely picked)
- Internals (B5 Systems internals are rarely picked)
Many builders mix them: 47% of B5 Systems builds add BCM, most often the buffer tube.
Biggest differences
"Picked" is the share of builds with that part that chose each brand.
| B5 Systems | BCM | Difference | |
|---|---|---|---|
| Price vs average | 11% cheaper | 24% pricier | B5 Systems cheaper |
| Share of builds | 14% | 37% | BCM 2.6x |
| Stocks picked | 11% | 1.6% | B5 Systems 7x |
| Grips picked | 21% | 5.0% | B5 Systems 4x |
| Parts listed | 205 | 776 | BCM 4x |
| Retailers carrying | 15 | 17 |
Price: B5 Systems wins
For the same part, B5 Systems parts run 11% cheaper than average and BCM parts run 24% pricier than average.
Builder favorite: BCM wins
B5 Systems is in 14% of builds and BCM is in 37% of builds.
Receivers: BCM wins
BCM upper receivers picked often, B5 Systems rarely.
Why BCM: BCM M4 uppers are machined from 7075-T6 forgings with a Type III hard coat anodized finish.
Most picked B5 Systems receivers
Rarely picked
Internals: BCM wins
BCM bolt carrier groups picked often, B5 Systems rarely.
Why BCM: The BCM bolt is Carpenter 158 steel, shot peened, high pressure tested and magnetic particle inspected.
Most picked B5 Systems internals
Rarely picked
Furniture: B5 Systems wins
Builders pick B5 Systems stocks (7x) and pistol grips (4x) more often than BCM. BCM 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: BCM wins
Of recent clicks through to a store for these brands, 95% went to BCM and 5% went to B5 Systems.
The full record
Everything we track for B5 Systems vs BCM, from builds, store listings and daily prices.
| B5 Systems | BCM | |
|---|---|---|
| Share of builds | 14% | 37% |
| Price tier | Mid priced | Premium |
| Parts listed | 205 | 776 |
| Part types | 7 | 34 |
| Retailers carrying | 15 | 17 |
| In stock now | 81% | 82% |
| Price change, 90 dayson the most picked parts | Flat | Flat |
| On sale now | None | None |
