9.2″ Upper with GPX-9 Rail System

Description

(NFA/PISTOL)

NITRIDE PREMIUM 9.2″ Pistol Upper w/ M4 Nickel Boron Barrel Extension

• 9.2″ Siphon AGP Barrel 4150 CrMoVa  (5.56 NATO Chamber)
• Nitride Treated Barrel (inside & out)
• CARBINE Gas System (SIPHON AGP)
• 1:7 Twist Rate
• 1/2×28 Thread Pitch
• Nickel Boron M4 Barrel Extension with Extended Feed Ramps
• Nitride M16 Bolt Carrier Group w/Logo (properly staked w/Grade 8 hardware)
• Nitride Carbine Gas Tube (Nitride Treated)
• Nitride Micro Gas Block .750 (Nitride Treated)
• GPX-9″ Free Floating Rail System
• Forged Charging Handle
• A2 Flash Hider 1/2×28

SOT GPX-9″ Rail System:

The SOT (GPX-9)” Rail System has an overall length of 9.2″; It’s Enhanced features include a machined one piece billet aluminum extruded rail which is much stronger and more rigid than 2 piece rail systems. The GPX-9 Provides (4) QD  Sling Swivel Attachments Points integrated in rear that are machined into both the left and right sides.

Designed to be used in with a (Micro/Low Profile Gas Block) on a (Carbine length gas system) or (Front Sight Base) with a  Midlength gas system). This rail system gives the user a more ” rigid” way to mount various accessories available to their AR15 platform. See more..