MK-15 MOD 1 PURG-R
5.56 NATO, .300 AAC Blackout, 6.5 Grendel, or .224 Valkyrie cal., short stroke gas piston, 16 (5.56 or .300 AAC) or 18 (6.5 or .224 Valkyrie) in. button rifled barrel, 10, 20, 30, or 60 shot Magpul PMAG, 6-pos. collapsible CTR stock, SWORD ...