9.2″ Upper with GPX-10″ Rail System and Buzzsaw Linear Compensator

5.00 out of 5
(1 customer review)


556(NITRIDE PREMIUM) (NFA/Pistol Upper)
9.2 Siphon AGP″ Carbine Upper, w/ GPX-10″ Rail System, M4 Nickel Boron Extension with Buzzsaw Linear Compensator, Complete Nitride Gas System and more!

In stock



NITRIDE PREMIUM 9.2″ Pistol Upper w/ M4 Nickel Boron Barrel Extension and Buzzsaw Linear Compensator

  • 9.2″ Siphon AGP Barrel 4150 CrMoVa  (5.56 NATO Chamber)
  • Nitride Treated Barrel (inside & out)
  • 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-10″ SOT Rail System
  • Forged Charging Handle
  • SOT Titanium Buzzsaw Linear Compensator

SOT GPX-10″ Rail System:

The SOT (GPX-10)” Rail System has an overall length of 10.3″. 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-10 Provides (6) 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..

1 review for 9.2″ Upper with GPX-10″ Rail System and Buzzsaw Linear Compensator

  1. 5 out of 5

    Shenandoah Patrick (verified owner)

    Great functioning work of art, the complete upper is definitely one of a kind. A friend of mine who’s an EX Marine referred me to this company, told me that the quality they put into building the best AR material out there. I’m a Army guy, and will definitely recommend special ops tactical product hands down. I’m very impressed with this pice of machinery. Thanks

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