M4E1 Threaded 13.9" 5.56 Mid-Length Gov Profile, Complete Upper w/ 12.7" MOD 4 - Anodized Black

This complete upper includes our Minimal Optical Deflection (MOD) 4 Handguard. The MOD 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on stiffness to drastically reduce deflection under load. It attaches to the upper receiver via a steel barrel nut, which also serves to significantly reduce point-of-impact shift when using an infrared laser aiming device under load.

A 7 sided M-LOK interface allows the user to customize their handguard to their exact specifications and needs. Lastly, each of the 4 QD sockets on the MOD 4 utilize a still liner to ensure a higher shear load and longer service life with the continued use of QD swivels.

INCLUDES:

M4E1 Threaded Assembled Upper Receiver

• MOD 4 12.7 Inch Handguard
• 13.9 inch 5.56 Mid-Length Barrel
• Low Profile Gas Block and Gas Tube
• Product comes assembled
• The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16" as defined by the ATF for a rifle build.

M4E1 THREADED UPPER RECEIVER FEATURES:

• New enhanced forging that gives the upper receiver a "billet look"
• New picatinny profile that blends seamlessly with our Enhanced Series Handguards
• M4 Feedramps
• .250 takedown pin holes
• Laser engraved T-marks
• Includes port door and forward assist installed

MOD 4 HANDGUARD FEATURES:

• Full top picatinny rail for optional attachments
• Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
• Compatible with low profile gas blocks
• 1.3 Inch Inside diameter
• 1.5 Inch Outside diameter
• Compatible with mil-spec AR15 upper receivers and barrels

13.9 Inch 5.56 MID-LENGTH BARREL FEATURES:

• 5.56x45mm NATO
• QPQ Finish
• Gov Profile
• .750 Inch gas block journal
• Mid-Length Gas System
• 1/7 Twist Rate
• M4 Feed Ramp Extension
• HP and MPI Tested
• Standard A2 Flash Hider