16.01″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (Rifle Length Barrel)

5.00 out of 5
(2 customer reviews)


These Barrels are Truly Amazing!

Our 16.01″ (PATENTED US PAT NO. 10,274,273) “SOT Siphon AGP” “Rearward” Angled Gas Port, (Rifle Length) 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

For the utmost in Recoil Reduction and Benefit of the Siphon System our Inferno Muzzle Brake is Highly Recommend with these Siphon Barrels.

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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)


  • (PATENTED US PAT NO. 10,274,273) “SOT Siphon AGP”  “Rearward” Angled Gas Port
  • Nitride Premium 16.01″ Rifle 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
  • .750 Gas Seat
  • Nickle Boron M4 Barrel Extension
  • Premium Nitride Treatment Inside and Out
  • Rifle Length Gas System
  • MILSPEC 1:7 Twist Rate
  • Muzzle 1/2×28 Thread Pitch
  • Barrel Weight (1lb 10.6 oz)
  • Custom SOT Medium Profile

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

**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.

2 reviews for 16.01″ Nitride Premium+ (Siphon AGP) w/ Nickel Boron (Rifle Length Barrel)

  1. 5 out of 5

    Christopher Rodewolt (verified owner)

    Absolutely amazing product. To say this barrel is a game changer is an understatement!! This barrel coupled with a muzzle brake is the absolute softest shooting, most controllable setup I have ever seen. Let it suffice to say I have handled many AR style rifles in my 20 year career but have never shot anything comparable to this. Literally takes the recoil down to almost 22 LR level for lightning fast follow up shots and controllability.

  2. 5 out of 5

    Mark Mondragon (verified owner)

    I purchased a 16.1 rifle length barrel a few months back. I wanted this for a new build that was centered around the softest recoil possible. I wanted lighting fast follow-up shots and the same reliability I could find in a 20” with less weight and a smaller package.

    This barrel delivered!
    SUPER soft recoil impulse, made for ultra-fast follow-up shots. I broke the barrel and rifle in with 55 gr cheap underpowered ammo. I wanted to make sure it could cycle the cheap stuff. No FTF or FTE… It ran like a top. Last round bolt hold open worked like a champ, even with underpowered ammo in a new rifle. Stock gas system, stock rifle buffer and spring.

    Dang thing works! And works well… Well enough that I am going to grab another barrel shortly.

    Thank you SOT for your Siphon AGP. I think I have a new favorite barrel!

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