ar 15 pistols,CMMG,54A186A-MB,5.7x28mm View cart “CMMG Mk4 Banshee 300 5.7x28mm, 5″ Barrel, Midnight Bronze, RipBrace, Threaded 1/2-28, M-LOK, 40rd CMMG Magazine” has been added to your cart. Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sale! IN STOCKCMMG Mk4 Banshee 300 5.7x28mm, 5″ Barrel, Midnight Bronze, RipBrace, Threaded 1/2-28, M-LOK, 40rd CMMG Magazine $1,975.57 Original price was: $1,975.57.$1,778.01Current price is: $1,778.01. Add to cart