GC_UPC Daniel Defense AR-15 MK18 Pistol Upper Receiver Assembly 5.56x45mm 10.3 Barrel - 679791" $1,412.00 23-004-08013-006 show more like this 14.25 MidwayUSA GC_UPC Daniel Defense DDM4 MK18 5.56mm 10.3" URG, Black $1,412.00 23-004-08013-006 show more like this Free Shipping over $500 RifleGear