 As of September 2006, limited numbers of these weapons have been re-imported from Russia to the United States as disassembled "spare parts kits", comprising the entire weapon excluding the receiver (as required by Federal law).An M1928A1 which also came with an unusual inline stock, modified with elevated sights to increase accuracy also existed.Some Thompsons were built with a folding stock, similar to the M1A1 Carbine for Allied tank crews, drivers and paratroopers and submarine raiders.