Aero Precision M4E1 Builder Set with 9" Enhanced Quad Rail Handguard - Anodized Black - APCS100205

Aero Precision APCS100205: This package deal includes the pieces you need to start building your own M4E1 (AR15) Rifle, including a M4E1 Enhanced Upper Receiver, AR15 Gen 2 9" Enhanced Quad Rail Handguard and a M4E1 Stripped Lower Receiver.

Upper Features:

• M4 Feedramps
• .250 takedown pin holes
• Lazer engraved T-marks
• Comes assembled, with dust cover and forward assist installed

M4E1 Specific Details:

• Handguard mounting platform is forged into the receiver
• Compatible with Aero Precision Enhanced and Quantum Series handguards but also fits most BAR-system handguards
• Barrel nut and wrench are included
• These uppers are not piston-kit compatible
• Will support barrels with a diameter up to 1"

Includes:

• AR15 M4E1 Upper Receiver in Anodized Black
• Port Door and Forward Assist installed
• Barrel nut
• Barrel nut wrench

M4E1 Lower Receiver 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.

Includes:

• Stripped M4E1 Lower Receiver
• Nylon tipped tensioning set screw
• Threaded Bolt Catch Pin

Enhanced Quad Rail Handguard Features:

• 1pc free float design
• Built in anti-rotation tabs
• Scalloped rails
• Continuous top rail
• 1.72" inside diameter (from barrel nut cut to forward end) fits most muzzle devices and 1.5" suppressors
• 1.78" inside barrel nut cut area diameter
• Compatible with low profile gas blocks
• Gen 2 Feature - Eliminated half of the 3, 6 and 9 o'clock picatinny rails, saving weight and providing a more ergonomic design in the rear gripping area
• Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal
• Gen 2 Feature - New profile for the continuous picatinny top rail