Adams Arms PZ AR-15 5.56 NATO Complete Upper Receiver Assembly 16" Barrel M4 Polymer Mil-Spec Hand Guard Matte Black Finish

Adams Arms
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The Adams Arms PZ model AR-15 complete upper receiver assembly is a tactical battle model upper designed to solve the problems that typically plague direct gas impingement systems. The Adams Arms PZ is built around a short stroke piston system which ensures that the gas which is siphoned off to cycle the action does not get returned into the chamber like with DI systems. Instead the gas is used to operate a piston rod which cycles the action reliably and with great regularity. The PZ is a great off the shelf complete upper receiver assembly that provides you with an incredible value for your piston gun spend.

Specifications and Features:
Adams Arms PZ AR-15 Complete Upper Receiver Assembly FGAA-01234
Short Stroke Piston System, Carbine Length
5.56 NATO (Accepts .223 Remington)
16" 4150 Chrome Moly Vanadium Steel Barrel (QPQ Melonite/Black Nitride)
M4 Contour
1:7" Twist Rate
Threaded 1/2x28
Not Chrome Lined
Forged 7075-T6 Aluminum Upper Receiver
Flat Top Upper with M4 Feed Ramps
Full Auto Rated 1 Piece Integral Piston Strike Face
A2 Flash Hider
.750" Diameter Gas Block
M4 Polymer Mil-Spec Hand Guard
A2 Flash Hider
Matte Black Finish