The Adams Arms team is committed to providing cutting edge technology that meets the real needs of the modern warrior. Adam Arms' Mid-Length Base AR-15 Gas Piston Upper Assembly is a standard MIL-SPEC AR-15 upper that incorporates patented Adams Arms technology with M4 style handguards.
The mid-length piston system provides a longer forearm, ergonomic grip and a longer sight radius between the front and the rear sight for quicker sight acquisition and less felt recoil. This AR-15 upper includes the patented Adams Arms piston system which allows the upper to run cleaner, cooler and longer; pinned and welded with a VDI Manimal Flash Hider. The piston system parts and the barrel have been treated with a salt nitride melonite process, making them harder and more corrosive resistant than hard chrome.
Features and Specifications:
AR-15 Complete Upper Assembly
Upper Receiver: A4 Flat Top, Forged
Chamber: 5.56mm NATO/.223 Remington
Barrel: 14.5", Government Contour, 4150 Chrome Moly Vanadium Steel With QPQ Melonite And Black Nitride Finish (Not Chrome Lined)
Rifling: 1:7" Twist
Barrel Contour: Government
Muzzle: 1/2"x28 Threaded
Muzzle Device: VDI Manimal Extended A2 Flash Hider
M4 Feed Ramps: Yes
Bolt Carrier: One Piece with Integral Piston Strike Face
Gas System: Mid-Length, Short-Stroke Piston Operated
Gas Block: Single Rail
Gas Block Diameter: 0.750"
Handguard: Two-Piece Polymer, Mid-Length
Weight: 4.387 lbs