Aero Precision M4E1-T AR-15 20" SS 6.5 Grendel Upper Receiver w/ ATLAS S-ONE 15" M-LOK Handguard - $374.99

Description

Includes:

M4E1 Threaded Upper Receiver
ATLAS S-ONE Handguard
20" Stainless Steel 6.5 Grendel rifle-length barrel
Low-profile gas block and rifle-length gas tube
Product comes assembled
A2 style flash hider
Does NOT include BCG or charging handle
M4E1 Threaded Upper Receiver

Anodized aluminum construction
New Picatinny profile
M4 feed ramp
.250 takedown pin holes
Laser engraved T-marks
ATLAS S-ONE Handguard

Anodized aluminum construction
Front and rear Picatinny rail
Compatible with low-profile gas blocks
Quick disconnect sling sockets at the 3, 6, and 9 o'clock positions
Compatible with Mil-Spec AR-15 upper receivers and barrels
1.3" inside diameter and 1.5" outside diameter
Indexing grooves at 3, 6, and 9 o'clock positions
20" Stainless Steel 6.5 Grendel rifle-length barrel

416R stainless steel construction
Corrosion-resistant bead blasted finish
1:8 twist
HP and MPI tested
Gas block journal is .750"
Compatible with rifle-length gas systems
DMR profile
M4 feed ramp extension
5/8x24 thread pitch

The Aero Precision® M4E1-T AR-15 20" SS 6.5 Grendel Upper Receiver w/ ATLAS S-ONE 15" M-LOK® Handguard is an easy and quick way to finish up any rifle build. The M4E1 Threaded Upper Receiver features lightweight aluminum construction and a corrosion-resistant anodized finish. Plus, this upper receiver comes with the port door and forward assist installed. The flat-top Picatinny profile blends seamlessly with Aero Precision's Enhanced Series Handguards for a clean, monolithic appearance, while the .250" takedown pin holes make assembly and disassembly with your rifle's lower receiver easy, and the laser engraved T-marks make mounting your favorite optics or iron sights a breeze. The ATLAS S-ONE Handguard boasts a rear and front Picatinny rail for your favorite iron sights or optics while quick disconnect sling sockets at the 3, 6, and 9 o'clock positions let you take advantage of quick disconnect rifle slings. What's more, this handguard is also constructed with anodized aluminum for unmatched strength. Compatible with low-profile gas blocks, this handguard is compatible with Mil-Spec AR-15 upper receivers and barrels for a true drop-in design.

The 20" Stainless Steel 6.5 Grendel rifle-length barrel completes this upper receiver build and is constructed with 416R stainless steel with a corrosion-resistant bead blasted finish for long-lasting durability. The gas block journal is .750" and this barrel is built for rifle-length gas systems. This rifle barrel features a DMR profile and boasts a 5/8x24 thread pitch for compatibility with your favorite muzzle devices like flash hiders and muzzle breaks. This barrel is HP and MPI tested and boasts a 1:8 twist for superior precision and accuracy with your rifle build. What's more, this barrel boasts an M4 feed ramp extension for smooth and reliable feeding. Includes M4E1 Threaded Upper Receiver, ATLAS S-ONE Handguard, 20" Stainless Steel 6.5 Grendel rifle-length barrel, low-profile gas block, and rifle-length gas tube. Product comes assembled. BCG and charging handle NOT included. Made in USA.

Specifications
Caliber: 6.5mm Grendel
Color: Black
Material: 416R Stainless Steel
Twist Rate: 1:8
Thread Pattern: 5/8-24
Attachment Type: MLOK
Handguard Length: 15"
Handguard Style: Free Float
Upper Type: Rifle
Options: W/O BCG & CH