American Made
Buy Machine Shop Direct
Need Assistance? Call us at 425.530.0837
Build Kit 16" 556 M4 1/9 Upper with 10" Quad Rail
On Target With
Savings Of
Original Price $439.99
Sale Price $329.99
Finish off that lower that has been collecting dust in the safe this year with Hardened Arms. All the parts you need to turn a stripped lower into a smooth shooting and accurate 16in 5.56mm NATO rifle. 

16" 556 M4 1/9 AR-15 Upper Receiver Assembly:

Hardened Arms M4 Feed Ramp Flat Top Receiver
Mil-spec 7075 Upper receiver
Black anodized mil-spec finished upper receiver
Feed ramps for increased feeding reliability on barrel and upper
Laser etched T-Marked upper receiver
4150CMV Stress Relieved Button Rifled Machined In House Barrel
16" M4 Profile barrel with M4 Extension
6-Groove, 1/9 twist button rifled
.750" diameter at gas block
1/2x28 threaded muzzle/barrel
Low profile gas block
Barrel dimpled to secure gas block
Carbine-Length gas system
A2 flash hider
10" Hardened Arms Quad Rail Hand guard (end cap available as an upgrade
Mil Spec Butt stock kit
Melonited BCG
Mil spec Charging handle
Lower Parts Kit

Fits any mil-spec AR15 lower receiver.
515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837