10.5″ 5.56 Upper with GPR-9 Rail System

Description

(NFA/PISTOL Upper)

NITRIDE PREMIUM 10.5″ Pistol Upper w/ M4 Nickel Boron Barrel Extension

• 10.5″ Carbine Barrel 4150 CrMoVa  (5.56 NATO Chamber)
• Nitride Treated Barrel (inside & out)
• CARBINE Gas System
• 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)
• SOT GPR-9″ Free Floating Rail System
• Forged Charging Handle
• A2 Flash Hider 1/2×28

GPR-9″  Rail System:

The SOTMFG (GPR-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. See more..