Spikes Tactical complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. Maintaining high standard of tolerances and attention to detail as these are the same uppers used for complete rifle builds. Every built upper and complete gun is test fired before leaving Spikes Tactical for function check before it reaches you.

Specifications:
Manufacturer: Spikes Tactical
8.1 Upper Receiver with 7" SAR3
Color: Black
7" SAR3 Rail
Caliber: 5.56
Forged Upper Receiver
7075 T6 Construction
Forward Assist
Ejection Port Door
Ejection Port Door Spring
Ejection Port Door Rod
8.1"Cold Hammer Forged Barrel
1/7 Twist Rate
1/2 X 28 Thread Pitch for Muzzle
5.56 Nato Chamber
.750 Gas Block Seat
M4 NIB Coated Barrel Extension
Black Nitride Coating
7" SAR3 Rail
7075 T6 Barrel Nut
6061 T6 Rail
Continuous Top Rail
Free Floating 1 Piece
Q.D
Attachment Points
Low Profile Gas Block
Solid Billet Steel
.750 I.D
Pistol Gas Tube Black Nitride Inside and Out
Gas Tube Roll Pin
Charging Handle
Forged Aluminum
Mil-Spec Type 3 Coating
Phosphate M16 Complete BCG
Phosphate Coated
Laser Engraved with ST Spider logo
High Pressure Tested (HPT)
Magnetic Particle Inspected (MPI)
A2 Flash Hider
1/2" Crush Washer

This upper receiver can be connected to any standard AR-15 pistol lower receiver. All NFA rules apply.