Earlier this year, Brugger & Thomet won the Army’s Sub Compact Weapon contract to supply up to 1,000 very short SMGs to DOD for use by security details. The gun had to be ambidextrous, very compact — under 15-inches overall with some sort of provision for a stock — and light. For reference, the very short HK MP5K, with no allowance for a stock, is 12.9-inches.
The winner: B&T’s APC9K, which has a 13.6-inch overall length with the stock fully collapsed. Further, the receiver can be made in a variant that accepts Sig P320 pattern mags, and keep in mind the Army just adopted that pistol as the M17/M18.
More in my column at Guns.com