[custom_headline type=”center” level=”h1″ looks_like=”h1″ accent=”true”]ABOUT[/custom_headline][text_output]



    • Higher Rate of Accuracy- 12-inch shot patterns @ 25 yds. with standard 00 Buck, 2-times tighter than a cylinder bore barrel.
    • Less Felt Recoil- Faster follow-up shots, easier training, makes 12ga accessible to all shooters.
  • Maximize performance- No need for choke tubes and their maintenance/ limitations.


Vang Comp Systems was founded in 1990 by Gunsmith and Inventor Hans J. Vang with the mission of bringing innovative, high-quality parts and services to everyone who owns and uses a shotgun.  Mr. Vang developed the Vang Comp System at the behest of a government agency which was searching for a way to make their duty shotguns safer to down-range bystanders, i.e. make their scatterguns shoot tighter shot patterns without the use of choke tubes.  This government agency also complained about the recoil and night-time muzzle flash of the 12ga shotguns and requested a mitigation of these factors as well….


Mr. Vang devised a system of lengthening the forcing cone of the shotgun barrel to allow a smoother transition of the shot column from chamber to bore, thus decreasing recoil and shot deformation.  He would then further back-bore the barrel so that the shot column gradually tapered and squeezed together as it traveled down the bore towards the muzzle.  Before they get to the muzzle, the hot expanding gasses which account for the muzzle flash are jettisoned through a precisely-calculated and rigorously-tested array of compensation ports.  This hot gas is discarded through 62 holes, 31 on either side of the front sight which contributes to the flat shooting, reduced felt recoil, eliminated muzzle flip and diminished muzzle flash characteristics of the Vang Comp System. 


With less deformation and a less turbulent flow, the pellets achieve a higher rate of accuracy. Back-boring the barrel from the chamber towards the muzzle creates a choke where there was none.  The rule of thumb allows that a standard cylinder bore barrel will shoot about 1-inch of spread per yard from the target (5 yards from target= 5-inch shot spread).  

The Vang Comp barrel modification produces shot patterns that are 2-times tighter.
We guarantee a 10-12 inch shot pattern at 25 yards out of any barrel that has had our treatment. 

[/text_output][custom_headline type=”center” level=”h1″ looks_like=”h1″ accent=”true”]FAQS[/custom_headline][accordion][accordion_item title=”Do I need to send the complete gun if i only want the Vang Comp System?”]

No, you only need to send the complete gun if you want NEW SIGHTS installed.

[/accordion_item][accordion_item title=”How long is the turn-around time for your system?”]

As of  February 2020 our current turn-around time for barrel work is about 14 business days.

[/accordion_item][accordion_item title=”What is the difference between a Remington Express and a Police Magnum? “]

The Remington Police Magnum shotgun is built heavier to withstand the abuse and pounding that police departments inflict on their gear. It has a metal trigger assembly versus the Express’s plastic assembly. The Police Magnum also has heavier springs (7 lb. sear disconnect spring versus’s the Express’s 5 lb. disconnect spring). The Police Magnum has a 22 inch magazine spring versus a 16 inch magazine spring in the Express. The Police gun comes with a heavier lifter spring. Each Police Magnum comes with front and rear sling swivel studs. These are just some of the differences in the two guns. Remember, you get exactly what you pay for. Both models function the same and digest the same ammo, so if you are inclined to inflict this type of punishment on your guns then consider a Police Magnum. Otherwise the Express model will serve you very well.

[/accordion_item][accordion_item title=”Do you do Vang Comp 20 gauge shotguns?”]

Yes we do, we are now setup for the 20 gauge shotguns.

[/accordion_item][accordion_item title=”Can you shorten my 18 1/2 in. barrel to 14 in. if I have a cover letter from the department head?”]

No, you must follow the BATF rules. We do not shorten barrels to 14″.

[/accordion_item][accordion_item title=”Can I shoot slugs out of the Vang Comp Barrel?”]

Yes you can! The Vang Comp System allows you to shoot whatever your shotgun will digest.

[/accordion_item][accordion_item title=”Do you sell just the barrels for Remington 870?”]

Yes we do, please call us for availability.

[/accordion_item][accordion_item title=”Do you modify barrels other than the Remington and Mossberg?”]

Yes we do, we can do Winchester Model 1200, 1300, 12 and 1897, Keltec KSG, they are the same price.

[/accordion_item][accordion_item title=”Do I want barrel porting or not?”]

The porting system decreases muzzle rise by up to 90%. It decreases muzzle flash by up to 50%. It is a sound investment.