12" Siphon AGP Barrel

12.0″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (MidLength Length Barrel)

5.00 out of 5
(3 customer reviews)


These Barrels are Truly Amazing!

Our 12.0″ (PATENTED US PAT NO. 10,274,273) “SOT Siphon AGP” “Rearward” Angled Gas Port, (MidLength) 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.

In stock


These Barrels are Truly Amazing!

Our Rearward Angled Gas Port accompanied with utilizing a longer gas tube, as well 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. Special Ops Tactical (PATENTED US PAT NO. 10,274,273)


  • “SOT Siphon AGP”  “Rearward” Angled Gas Port (PATENTED US PAT NO. 10,274,273)
  • Nitride Premium 12.0″ MidLength Barrel
  • Reduced Recoil impulse over any other barrel in it’s class
  • Improved Gas Flow
  • 5.56 NATO Chamber
  • +11 Degree Target Crown
  • MILSPEC 4150 CrMoVa
  • .750 Gas Block Seat*
  • Nickel Boron M4 Barrel Extension
  • Premium Nitride Treatment Inside and Out
  • Mid Length Gas System
  • MILSPEC 1:7 Twist Rate
  • Muzzle 1/2×28 Thread Pitch
  • Barrel Weight (1LB 4oz)
  • Custom SOT Siphon Medium Profile


**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.

3 reviews for 12.0″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (MidLength Length Barrel)

  1. 5 out of 5

    chvy0110 (verified owner)

    Great barrel! Picked it up Thursday and shot it today. 100 yds and kept it within an 8” circle. The Siphon system is definitely what I will be using from now on.

  2. 5 out of 5

    John Hansen

    Top quality barrel, super smooth and flat shooting barrel. The customer service with SOT is also top notch. If you are running a law folder with this barrel make sure to request them to adjust the gas port so that you get enough gas pressure.

  3. 5 out of 5

    timthomaslee (verified owner)

    Just received my 12″ midlength barrel. The service and craftsmanship was outstanding. The AGP angled gas port is such an improvement over traditional 90 degree gas ports. These guys make killer barrels!

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