The Daniel Defense MK18 Upper Receiver is a complete upper receiver system ideal for placement on AR pistol lower receivers or AR rifle lower receivers (NFA Short Barreled Rifle Regulations Apply). The upper is built around a carbine-length direct impingement gas system and a 10.3″ barrel chambered for 5.56 NATO. The MK18 Upper features Daniel Defense’s RIS II Rail System with Santoprene heat resistant rail panels. Components of the Daniel Defense MK18 Upper ReceiverGas System: Low Profile 4140 Steel Gas Block, Carbine-Length, Direct Impingement Barrel: 10.3″ Cold Hammer Forged Chrome Moly Vanadium Steel with 1:7″ Twist Muzzle Device: 17-4 PH Steel Daniel Defense Flash Suppressor with Salt Bath Nitride FinishBolt Carrier Group: MIL-SPEC M16 Profile Chrome LinedHandguard: 6061-T6 Aluminum Daniel Defense RIS II Rail System with Rail Panels. Daniel Defense MK18 Black 5.56 NATO 10.3″ Short Barrel Upper Receiver Group 23-004-08013-006
Sons of Liberty Gun Works SOLGW Broadsword 6mm MAX 20" SPR Bbl No BCG/CH Upper Receiver BROADSWORDUPPER-89-20-6MAX Original price was: $1,250.00.$1,187.50Current price is: $1,187.50. 
Barrett M107A1 .50 BMG Semi-Auto Rifle System Grey Cerakote Receiver Black 29" Fluted Barrel Showroom Demo 14553 Original price was: $11,914.00.$10,499.00Current price is: $10,499.00. Daniel Defense MK18 Black 5.56 NATO 10.3″ Short Barrel Upper Receiver Group 23-004-08013-006
Original price was: $1,563.00.$1,259.99Current price is: $1,259.99.
