Aero Precision M4E1 Enhanced Gas Piston Complete Upper with 16" 5.56 M4 Carbine Length Barrel & 15" Enhanced M-LOK Handguard - Anodized Black - APAR100218M73

Aero Precision APAR100218M73: The M4E1 Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper receiver itself. Through superior engineering, Aero has condensed the parts needed to mount a free-floated handguard to a mere 8 screws. Since the handguard mounting surface and upper are of the same forging, not only is it a stronger system, but they are able to make additional lightening cuts to save weight and allow for more efficient cooling.

INCLUDES:

• M4E1 Enhanced Upper Receiver
• 15" Gen 2 Enhanced Handguard
• 16" 5.56 CMV Barrel
• VG6 EPSILON Muzzle Device
• Port Door Assembly

M4E1 ENHANCED UPPER RECEIVER FEATURES:

• Custom enhanced forging that gives the upper receiver a "billet look" while maintaining the structural integrity of a forged part.
• Picatinny profile that blends seamlessly with Aero's Enhanced and ATLAS Series Handguards
• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks

GEN 2 ENHANCED HANDGUARD FEATURES:

• 1-piece free float design
• Built in anti-rotation tabs
• Scalloped rails
• Continuous top rail
• 1.78" inside diameter
• Compatible with low profile gas blocks
• Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• M-LOK attachment points

16" 5.56 BARREL FEATURES:

• 5.56 NATO 16" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
• .750 gas block journal
• Mid length gas system, .0785 gas port
• M4 Feed Ramp Extension
• HP and MPI tested