5.9″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (Pistol Length Barrel)

5.00 out of 5
(1 customer review)


Our 5.9″ AR15 Barrel is  Truly Amazing! (5.56)

Featuring our patented Angled Gas Port, Our Nitride Premium Barrels are Precision made using 4150 Chromoly Vanadium and Feature an +11 Degree Target Crown and  Superior Nitride Finish with Nickel Boron M4 Extension for Supreme Reliability. (Gas Block and Tube sold separately)

In stock

  • Gas Tube/Block Add ons: $0.00
  • Barrel Price: $184.99
  • Total: $0.00


These Barrels are Truly Amazing!

Our AR15 Barrel featuring an Angled Gas Port as a smoother gas flow with one less 90 degree turn in gas flow, “all not previously possible with any other barrel”, equates to the smoothest, lowest recoiling barrels on the market that no other barrel is able to achieve.  SOTMFG (PATENTED US PAT NO. 10,274,273)


  • (PATENTED US PAT NO. 10,274,273) “SOTMFG  Siphon AGP” Angled Gas Port
  • Nitride Premium 5.9″ Pistol Length Barrel
  • Reduced Recoil over any other barrel in it’s class
  • Improved Gas Flow
  • 5.56 NATO Chamber
  • +11 Degree Target Crown
  • MILSPEC 4150 CrMoVa
  • .936 Gas Seat*
  • Nickel Boron M4 Barrel Extension
  • Premium Nitride Treatment Inside and Out
  • PISTOL Length Gas System
  • MILSPEC 1:7 Twist Rate
  • Muzzle 1/2×28 Thread Pitch
  • Barrel Weight (1LB 1.8oz)
  • Custom SOT HEAVY Profile

*(Gas Block and Gas Tube that are pictured are not included)

Click the link below to view the correct gas block for our 5.9 Siphon AGP Barrel.


**These barrels are designed to work with (Milspec) components and may not be compatible with some after market (PDW STOCKS) as some require more than normal gas pressure to cycle. For Utmost reliability and smoothness we recommend using a Milspec Buffer System with these barrels.

1 review for 5.9″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (Pistol Length Barrel)

  1. 5 out of 5

    C. Young

    This barrel is, as the description says, “truly amazing!” The fit, finish, etc. is top notch. Don’t let the naysayers who claim shorties such as this are not accurate beyond a certain point. I was making consistent head shots on a paper silhouette target at 100 yards with this barrel! Also, just like the barrel, I want to give a big shout-out to Special Ops Tactical for having AWESOME customer service! To say I am extremely impressed/pleased with my purchase is an understatement!

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