The Core15 M4 Complete Upper is an excellent upper to complete your AR build. The Core15 M4 Complete Upper carries the same excellent quality and attention to detail as the rest of the Core51 line up, ensuring you have the very best. Don't let your AR build quality drop due to some unknown upper, pick up a Core15 M4 Complete Upper and build with quality.

Features and Specifications:
Manufacturer Number:100276
CORE15 Mil-Spec Forged 7075-T6 M-4 Upper Receiver, Type III Class II Hard-coat anodized finish, M4 Feed Ramps, (1913 Picatinny rail flat top) w/ dry lube internal finish and laser engraved T-markings
5.56 NATO (accepts .223 Remington)
16" 4150 CMV Chrome Moly M4 Profile Chrome Lined Barrel
1:7 Twist
Direct Gas Impingement Gas System
Gas tube made of 304 grade Stainless Steel
Chrome lined Steel Bolt Carrier and Bolt Carrier Key
Magnetic Particle Inspected (MPI) Bolt Assembly
A2 Front Sight
A2 Flash Hider
M-4 Style Thermoset molded Polymer Hand Guards with Dual Heat Shields
A Frame Front Sight Base (Forged)
Black