MasterPiece Arms is releasing a new SBR: the MPA570SST-SBR. The 570SST-SBR will be chambered in 5.72 x 28, have adjustable front and rear sights, side-cocking charging handle, muzzle brake, MPA's own short aluminum quadrail, a low profile folding buttstock and the Strike Industries Foregrip. The Barrel will be 10" threaded, featuring 1/2" x 28 threads so it will be 'can-ready'. The MPA 570SST-SBR is based on their MPA57SST 5.72 x 28 MM pistol.
About the stock:
MPA570SST-SBR Side Cocker, Scope Mount one (1) 8" Threaded Barrel one (1) 20 Round Polymer Magazine one (1) Muzzle Brake Thread Size 1/2 x 28 American Made Ships in Gun Case Lifetime Guarantee Strike Industries Foregrip MPA Short Aluminum Quadrail Adjustable Front Sight Chamber 5.7x28mm MPA Low Profile Buttstock MPA Side Folding Attachment ALL NFA RULES APPLY MPA Suppressor Not Included