A keen-eyed reader noticed that Masterpiece Arms have listed on their website a new MPA pistol chambered in 5.7x28mm. To accommodate the 30 round 5.7mm magazine (the same magazine used by the FN pistols?), they have a redesigned grip, which looks a lot more ergonomic than the aweful MAC-10 grip.
The pistol features a picatinny rail, a 5″ barrel threaded with a muzzle brake and a side-mounted cocking handle. The MSRP is $599.
[ Many thanks to Aaron for emailing us the info. ]