SIGMPX PDW W/ Aluminum Key Mod Hand Guard. The gun comes in the factory box with all paperwork, single point sling, sling attachment, one 30rd Sig MPS Gen2 magazine, and all paperwork. This is classified as a pistol and is NOT an NFA item. The Sig Brace is not to be used as a shoulder stock, doing so violates ATF regulation and will deem the use of it as a Short Barrel Rifle (SBR).