E3 ARMS Upgraded Upper with RIS/RAS Rail & Pencil Barrel

Product Description

E3 Firearms COMPLETE 5.56 UPPER (Mil-Spec) 7075 Forged Aluminum A-3 Flat Top with T-Marks NICKEL BORON FULL AUTO Bolt Carrier Group 8620 steel Bolt is 158 Carpenter Steel Bolt is HPT, MPI Front Rail Gas Block Barrel: Pencil Barrel Melonite Finish 1:9 Twist Light Weight. 5.56 Chamber (also accepts .223 Mil Spec M4 Feed Ramp HPT & MPI Carbine Length Gas, direct impingement system Gas port drilled and tuned for optical cycling. Our 16″ Pencil Barrels which are more rigid will eliminate any vibration and improve accuracy while at the same time offer lighter weight of that approaching an M4 as opposed to the heavier bull barrels. Our barrels have been professionally developed for accuracy and competition shooting. With a Melonite finish applied to the steel through salt bath ferritic nitrocurizing our barrels not only add to the life of the barrel by over twice of that of a chrome lined barrel but also improves the accuracy, decreases the friction & heat increasing velocity. This upgrade includes our Nickel Boron Bolt Carrier, Titanium firing pin and RIS/RAS rail. All of our uppers are available with the standard M4 Melonite barrel, the Stainless Steel barrel or our Pencil Barrel. We try to keep all varieties in stock. If the one of the barrel choices is not in stock we will build your upper receiver with one of the barrels in stock and notify you. If you require a specific barrel, there may be a delay in building your upper receiver.

Pencil Barreled railed upper
Ris/Ras rail
Pencil barrel 1-9 twist  light weight melonited
7075 Upper receiver M4 feed ramps Tmarked
Nickel Boron Full Auto carrier 8620 steel
Bolt is Carpenter 158
Ejector is melonited
Extractor is melonited heat treated and shop peen
Gas key is machined
Comes with titanium firing pin
Railed gas block with SS tube