Aero Precision M4e1 Barreled Upper 16" 5.56 M4 Barrel Quantum 15" M-Lok HG - Black APAR640105M6

Features:

• M4E1 Upper Features:
• Forged from 7075 T6 aluminum
• Precision machined to M4E1 specs
• M4 feedramps
• Matte black hard coat anodized Mil 8625 Type 3 Class 2
• Laser engraved T-marks
• Comes assembled
• with port door and forward assist installed
• Accepts standard AR15/M16 components
• Handguard mounting platform is forged into the receiver
• Works with Aero Precision handguards but also fits most BAR-system handguards
• Barrel nut and wrench are included
• Quantum Handguard Features:
• 1pc free float design
• Removable 4-slot picatinny rail section for front sight
• Built in anti-rotation tabs
• 7 mounting surfaces for KeyMod accessories
• 1.78in inside diameter fits most muzzle devices and 1.5in suppressors
• Compatible with low profile gas blocks
• 16in 5.56 M4 CMV Carbine Barrel Features:
• 5.56 Nato 16in Barrel
• 1/7 twist
• 4150 CrMoV
• QPQ
• gas port drilled
• .750 gas block journal
• Carbine length gas system
• .0785 gas port
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider

Includes:

• M4E1 Enhanced Assembled Upper Receiver
• Quantum Handguard of choice
• 16in 5.56 M4 CMV Carbine Barrel
• Low Profile Gas Block and Carbine Length Gas Tube

Features:

• Threaded Bolt Catch Roll Pin - Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16" Hex Key required for assembly.
• Integrated Trigger Guard - Eliminates the possibility of breaking the trigger guard tabs by integrating the trigger guard into the lower creating a stronger more rigid platform to build upon.
• Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
• Threaded Takedown Pin Detent Recess - Allows user to easily install the Takedown Pin detent and spring with the use of a 4-40 set screw (no more launching detents across the room).
• Increased Magwell Flare - Increased the flare of the magwell to aid in quick and efficient magazine changes.
• Marked and milled to accept short-throw safety selectors but will work with standard selectors as well.