8" 300BlkOut Upper w/ Javelin-8.5" SD Rail System

300BLKOUT 8.0″ Upper w/ JAVELIN-8.5″ SD Rail System No Muzzle Device


(300BLKOUT) 8″ Pistol Upper, w/JAVELIN-8.5″ SD Rail System, M4 Nickel Boron Extension, Nitride Treated BCG, No muzzle device.

In stock



NITRIDE PREMIUM 8″ Pistol Upper w/M4 Nickel Boron Barrel Extension:

  • Barrel 4150 CrMoVa 300BLKOUT (7.62×35 Chamber)
  • 8.0″ Nitride Treated Barrel (inside & out)
  • 1:7 Twist Rate
  • 5/8×24 Thread Pitch
  • Nickel Boron M4 Barrel Extension with Extended Feed Ramps
  • Hand Guard Type: Our JAVELIN-8.5″ SD MLOK Free Floating Rail System
  • Nitride M16 Bolt Carrier Group w/Logo (properly staked w/Grade 8 hardware)
  • Nitride Gas Tube (Nitride Treated)
  • Nitride Micro Gas Block .750 (Nitride Treated)
  • Forged Charging Handle
  • No Muzzle Device

SOT JAVELIN-8.5-SD Rail System:

The SOT (Javelin-8.5 SD M-LOK)}” Rail System has an overall length of 8.5″. It is a cutting edge, highly refined rail system that blends state of the art custom precision CNC machining along with ultra-aggressive Stealth like design. The Javelin is machined out of a one-piece billet aluminum extruded rail which is much stronger and more rigid than 2 piece rail systems. The Javelin series boasts with aggressive good looks as well as being tough enough to handle any mission all while weighing in at only 8.1oz.! The Javelin-8.5 SD M-LOK } Provides (3) Sling Swivel Attachment Points in total; (3) QD points on the Rear that are integrated into the left, right and bottom of the rail.

Designed to be used in with a (Micro/Low Profile Gas Block) on a (Pistol Length gas system). This rail system gives the user a lightweight more ”rigid” and modular way to mount accessories to their AR15 platform.


  • Free Floating 223/556 AR15 Platform
  • CNC machined from 6061-T6 Aircraft Grade Aluminum
  • Single Piece Billet Machined Extrusion
  • Rail Weight: 8.1 oz. (Nut 2.4oz)
  • (3) QD Scockets
  • Anti Rotation Design
  • Solid mount interface
  • Wicked Stealth Sleek Industrial Appearance
  • Mil-Spec 1913 Picatinny Rails with M-LOK
  • Mil-Spec Type III Hard Coat Anodized
  • Inside Diameter: 1.601 inch
  • Width: Outer Dia. 2.55 inches at widest points
  • Provides a Continuous Limited Upper Rail
  • Made in the USA by Special Ops Tactical
  • Includes: Barrel Nut, Shims, Hex Key, Instructions, Screws
  • Requires 1-1/16 WRENCH for Barrel Nut Installation


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