try sbr
try a short barreled ak with folding stock, or a KRISS Vector SBR .45 ACP, or a mossberg 500/ remmington 870 with a ati top folding stock. o and ofcourse the mac comes in 5.7 cal for bout 600$ also kel-tec plr 16 .223 hi cap for 500$ if you wanna go cheaper
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