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
 
ATLAS R-ONE 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” Inside diameter
 
1.5” Outside diameter
 
Compatible with mil-spec AR15 upper receivers and barrels
 
16" 5.56 Mid-Length Barrel Features:
 
5.56 NATO 16" Midlength, 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
 
Standard A2 flash hider
 
The M4E1 Complete Lower Receiver is the perfect base for your custom AR15 build. This complete lower features our custom designed M4E1 Lower Receiver and is upgraded to include a MOE SL® Grip and MOE SL® Carbine Stock. Save when you buy it complete and let our specialists do the installation for you!
 
Includes:
 
M4E1 Stripped Lower Receiver
 
MOE SL® Grip
 
MOE SL® Carbine Stock
 
Lower Parts Kit
 
Carbine Receiver Extension
 
AR15 Carbine Buffer and Spring
 
These parts are installed
 
Our M4E1 Lower Receiver delivers billet aesthetics at a forged price. This custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. It has been engineered with upgraded features, including a threaded bolt catch roll pin, integrated trigger guard, upper tension screw, threaded takedown pin detent recess and increased magwell flare.
 
This high quality bolt carrier group is a valuable addition to your AR15 build.
 
Features:
 
M16-cut carrier
 
Machined from 8620 steel
 
Carrier has forward assist serrations
 
Mil-Spec phosphate coating
 
Properly staked gas key
 
Chrome lined gas key and bolt channel
 
5.56 Bolt is machined from Carpenter 158 tool steel
 
Shot peened
 
HPT tested/MPI marked
 
Black o-ring insert on extractor
 
High quality BCG
 
This sleek and simple mil-spec Charging Handle is the perfect addition to your build.
 
Features:
 
Tried and True Standard Charging Handle
 
Made of 7075 Aluminum
 
Black Anodize
 
Caliber - 5.56
 
Made in the USA