Sbt5a H&k Mp5 Side Folding Pistol Stabilizing Brace

The SB Tactical SBT5A brace gives HK MP5 and MP5K Reverse Stretch pistol builds a side-folding stabilizer modeled after the original B&T stock. It's aimed at shooters running MP5-pattern pistols who want a compact, fast-deploying brace that keeps overall length down for storage and transport. The assembly ships complete and ready to install, with a machined endplate that mates to the receiver. At 10.5 inches long and 14.2 ounces, it folds with a single button push and can be fired in the folded position, which makes it a practical choice for tight-quarters work and range use alike.

The endplate is machined from 6061 aluminum with a hard-coat anodized finish and includes an integral QD socket for sling attachment. The brace body uses molded polymer and rubber, and an adjustable nylon stabilizing strap comes included. The side-folding mechanism is integral to the endplate rather than a bolt-on adapter, so it sits low and tight against the receiver when collapsed. Per manufacturer specifications, the SBT5A is rated for multiple calibers across the MP5 platform, including 9mm, .40 S&W, .45 ACP, 10mm, 5.56 NATO, and 300 Blackout. It measures 1.25 inches at its widest point. The single-button fold lets a shooter open or close the brace without tools, and the QD socket pairs cleanly with most of our tactical slings.

This brace suits anyone building or upgrading an MP5 or MP5K pistol who needs the footprint to shrink without removing hardware. The folded profile makes it easier to fit into a backpack or vehicle, and the ability to fire while folded keeps it usable in confined spaces. It's a US veteran-designed assembly made in the USA. If you're outfitting a build, take a look at our rifle parts and single point sling options to round out the setup before your next range trip.