M4e1 Superlative Arms Piston Complete Upper Receiver Groups - Piston Upper 16in Barrel 15in Handguard Black

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