B5 Systems

B5 Systems ranked #12 of 323 brands on GunPartPicker in September 2026, just behind Timber Creek, with about 2% of every part builders added. Up from #13 in August. Builders reached for B5 Systems mostly for pistol grip parts. The most added single part was the B5 Systems Trigger Guard ATG-001-01, on top again this month.

Stocks and braces were the busiest B5 Systems category in September: 54 products came back in stock, several more than once, and demand for them rose about 15% on August. Demand for pistol grips slipped about 18% on August. About 79% of the 205 B5 Systems products we track are in stock today.

Also popular this month: B5 Systems Type 22 P-Grip - Black, B5 Systems Government Issue SOPMOD Stock Collapsible Mil-Spec Black, B5 Systems P-Grip 23 Black Composite and B5 Systems SOPMOD Government, Mil Spec, Coyote - SOP1352.

In GunPartPicker builds

• #22nd most added pistol grip brandTop part: Type 22 P-Grip
• #33rd most added trigger guard brandTop part: Trigger Guard ATG-001-01
• #33rd most added stock brandTop part: Government Issue SOPMOD Stock

Why B5 Systems

B5 Systems is an Ohio company, founded in 2008, that has made the SOPMOD stock for the Department of Defense since 2011. It also supplies furniture to more than 70 gun makers, so you may already own a B5 part without knowing it.

The Bravo stock is the one most people buy. It weighs 9.3 oz, fits mil-spec carbine tubes, has steel QD sling mounts and runs slimmer than the SOPMOD. The Army added it to its Additional Authorized List for the M4 and M4A1 in 2024.

The P-Grip 22 and 23 both sit at a steeper 13 degree angle. The 23 has a beavertail for forged mil-spec lowers, and the 22 drops it for billet lowers or people who don't like one. The line also covers the Enhanced SOPMOD, the Collapsible Precision Stock and M-LOK handguards.

The small parts cost a little less than the typical part: about $15 for a grip against roughly $20, and $12 for a trigger guard against $15. Both are the second most added in their slots, with the trigger guard in 27% of builds that have one and the grip in 21%.

The common complaint is a little wobble. Some Bravo owners find it wobbles a little on a mil spec tube, and a few strips of tape usually fix it. It also costs more than the typical stock, about $63 against roughly $53.

After years of mostly OEM and military work, B5 began pushing sales straight to shoppers in 2024, so its parts are easy to find at the big AR stores and on its own site.

We'd start with the P-Grip 23 and a trigger guard, which cost less than average. Add the Bravo if you want a military pattern stock and don't mind a shim.