Built like a tank and compact - just be aware of the proprietary buffer system. - SB Tactical HB AR Rifle Brace

The SB Tactical HBPDW is a compact, rugged PDW-style brace that’s ideal for ultra-short AR pistol builds in 5.56 or .300 Blackout — but it comes with some quirks you need to know up front.

First, the buffer tube is proprietary, which means you can’t just drop in any standard carbine buffer setup. After installing a forced reset trigger (FRT), I had to swap to a Maxim H3 buffer and spring, which solved function issues and tamed recoil. If you plan on running exotic triggers or need tuned cycling, factor this into your build.

Now, as for the brace itself — it’s solid. The side-actuated deployment button takes a little getting used to (especially compared to rear-latch PDW stocks), but once you’re dialed in, it’s smooth and quick. The brace locks up tight, no slop, and feels more like a minimalist stock than a traditional pistol brace. Even under recoil, it's stable and confidence-inspiring.

Size-wise, the HBPDW keeps your build super compact without giving up control. Perfect for close-quarters or suppressed work, especially in .300 Blackout.