DSA ZM4 AR15 Slim Series 5.56 Upper Receiver Assembly - 20" HBAR Chrome Moly Rifle Length Barrel

DSA ZM4 AR15 Slim Series 5.56 Upper Receiver Assembly - 20" HBAR Chrome Moly Rifle Length Barrel

This DS Arms Slim Series upper receiver assembly is built featuring a billet upper receiver & handguard. This combination makes for a very slick & streamlined look perfect for your next build!

Specifications:

• 20" HBAR Profile Barrel
• 5.56x45 mm Chamber & Bore
• 4150 - 11595E Mil-Spec Barrel Steel
• Barrel Has Mil-Spec. Phosphate Finish
• 1:7 Twist Rate
• Barrel Threaded 1/2x28 Right
• M4 Barrel Extension
• Rifle Length Gas System
• Stainless Steel Gas Tube
• 4140 Chrome Moly Steel Set Screw Low Profile Extended Gas Block
• 6061 Billet Aluminum Upper Receiver
• Upper Receiver & Handguard Are Hardcoat Anodized per MIL-A-8625F, Type III, Class 2 Finish
• M4 Feed Ramps
• Mil-Spec. Ejection Port Door
• A2 Birdcage Flash Hider
• 15" Free Float M-LOK Handguard

Barreled Upper Assembled As Shown, Does Not Include Bolt Carrier Group or Charging Handle

Please Note: The barrel featured in this upper receiver assembly once had a sight tower installed which was determined to be canted and then removed. As such the barrel does have the taper pin holes drilled through. These taper pin holes are covered by the extended gas block.