Maxim Defense, based in Forest Lake, Minnesota, builds compact, mission-focused firearms and is well known for its innovative stock and brace systems. The company's gear has been used by military and special-operations users, and its designs emphasize maximum capability in the smallest possible package.
The PDX is the brand's signature: an ultra-compact personal defense weapon built around short-barreled 5.56 and .300 Blackout with a proprietary muzzle device and folding/collapsing brace, producing a remarkably small but potent platform. The MD9 extends the concept into pistol-caliber 9mm, and Maxim's CQB and other stock systems remain popular upgrades for AR builders.
For shooters who prioritize extreme compactness without giving up capability, Maxim Defense offers some of the most distinctive small-footprint firearms available.