Brand new in the box Sig Sauer M400 in 300 blackout AR-15. 16 inch barrel. black magpul furniture. 1 30 round magpul mag. magpul sights Model# SIG RM400300B16BECP . Had this on backorder so long I went ahead and bought something else. Really nice innovative ambidextrous mag release and ambi safety and cast in sling mounts that should come on all AR-15's. Only had it out of the box long enough to sign the paperwork. I'll throw in 100 rounds of 300 BO ammo load of your choice. $1000.