Spike’s Tactical Complete Upper Receiver 223 Rem/556NATO 16″ Chrome Lined Barrel 1:7 Twist Fits AR Rifles Flat Top Receiver A2 Front Sights Black Finish STU5025-M4S

Spike’s Tactical Complete Upper Receiver 223 Rem/556NATO 16″ Chrome Lined Barrel 1:7 Twist Fits AR Rifles Flat Top Receiver A2 Front Sights Black Finish STU5025-M4S

Spikes complete upper assemblies will arrive to you inspected” tested” and ready to drop-in and go to work. Spikes maintains the same high standard of tolerances and attention to detail as the uppers they use for complete rifle builds. Every built upper and complete gun is test fired before leaving Spikes facility for function check before it reaches you.

STU5025-M4S Features:

SPKSTU5025-M4S

Forged Upper Receiver

16 M4 Profile Barrel”

Phosphate M16 Complete BCG

A2 Front Sight Base Pinned

Type of Barrel: 0.0465277777777778

Barrel Length: 16″

Description: Flat Top

Finish: Black

Fit: AR Rifles

Caliber: 223 Remington

Caliber: 556NATO

Model: LE

Sights: A2 Front

Type: Upper