MCX Virtus conversion kit for MILSPEC AR lower. 9 inch barrel with ACC 51T Brakeout 2.0. Sig 2-stage trigger & original flash hider. This includes the lower receiver adapter and a folding MILSPEC buffer tube adapter. $1,250 plus shipping and insurance. MCX Virtus 9 inch 300 BLK.JPGMCX Virtus 9 inch 300 BLK #2.JPG