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Sig Sauer P320-M18 Light-Mounted Compensator

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Transform your shooting experience with precision and control. The Vantage Point Armory Compensator combines innovative technology with a patent-pending design, offering unparalleled functionality and adaptability for any situation.

Minimize Recoil / Reliable Compensation: Minimize recoil and maintain control shot after shot. During firing of the weapon, the attached compensator funnels the gas from the propellant through the ports machined into the compensator.  This acts the same as other compensators on the market.  However, because this system is not attached to the slide or barrel it does not inhibit, change or impede the cycling action of the pistol.

Enhance Stability: Ehanced stability and  target reacquisition for unparalleled accuracy

Rugged and Reliable: Designed to withstand intense shooting sessions. Drop tests have proven the Vantage Point Compensator to be as rugged as it is effective.

Interfaces with the Pistol via a Weapon-Mounted Light: Ideal for those seeking enhanced performance with a weapon light:

Holster Selection: Any universal holster (e.g., PHLster Floodlight) or custom holster that normally accepts a standard frame-mounted accessory such as a Surefire X300U-A light will fit with no modifications to the holster because the accessory remains in the same location as when mounted using the original rails that originally came with the accessory. Learn more about holster compatibility here.

Standoff Device: When in a situation where the muzzle of the firearm is pushed up against its intended target, the pistol will not go out of battery and therefore it will still be able to fire with the compensator in place. 

Ease of Cleaning: Barrel-mounted compensators need to be disassembled and unthreaded to be cleaned which can be a hassle and time consuming to re-time the device. This unit can just be unclamped from the rail by disengaging the locking lug on the accessory for easy field stripping and cleaning of the firearm and compensator.

Price vs. Competition: Since the Vantage Point Compensator mounts to the accessory rail, there is no need for expensive aftermarket barrels.

50 State Legal: Since no threaded barrel is required, our compensator is legal in all 50 states.

Sleek Design: The designer has matched the lines of each individual slide to the compensator, resulting in a streamlined device.

Made in USA: Crafted with precision from premium materials in the USA.

  • Compatible with: Sig Sauer P320-M18
  • Anodize Color: Black
  • Material: 7075 Aluminum
  • Rated for Standard and +P/+P+ Ammo
  • Factory slide, barrel, and frame required for proper installation

Carefully read and follow the instructions below to avoid damaging your compensator and firearm. Failure to follow these instructions may result in injury to the shooter and damage to the compensator and firearm.  As the Customer, you acknowledge and agree that it is solely your responsibility for complying with these procedures and checking your compensator regularly. We are not responsible for damage to the compensator or firearm. 


Step-by-Step Instructions for Assembling the Vantage Point Sig Sauer P320-M18 Light-Mounted Compensator to the SureFire X300U-A or X300T-A Weapon Light.

Before you begin, ensure you have the following: 

  • VP Armory Sig Sauer P320-M18 Light-Mounted Compensator
  • SureFire X300U-A or X300T-A Weapon Light (& “P” Latch)
  • 3/32” Allen Wrench
  • Torque wrench (optional but recommended)
  • Sig Sauer P320-M18


  1. Verify the Correct Light:
    • Ensure you have the required light for the assembly, specifically the SureFire X300U-A Weapon Light or X300T-A Weapon Light.
      • THE COMPENSATOR WILL ONLY WORK WITH AN X300U/T-A MODEL WML- the "-B" or X300V (thumbscrew models) will NOT work with this compensator
      • The -A model X300 MUST be used with the Surefire Rail-Lock Kit(included with every Surefire X300-A), installation instructions can be found here: Redirecting to Big Tex Ordinance
  1. Prepare the Firearm:
    • Ensure the firearm is unloaded before proceeding.
  1. Install the Lock Bar:
    • The light comes with a stainless wedge block that allows you to increase tension. Plastic frame guns can vary, so this wedge helps fill in any gaps and provide tension. Begin by installing the lock bar into the light, making sure to utilize the P rail lock during assembly.
      • *The "P" latch on the Surefire X3000U-A or X300T-A must be used.
    • Slide the lock bar inside the notch on the compensator's tip.
    • Push the lock bar inward until it securely locks into place, ensuring a tight and stable fit.
    • Ensure the stainless steel screw is correctly positioned in its pocket.
  1. Align the Compensator:
    • The compensator has cutouts to accommodate the rail lock.
    • Align the holes on the compensator with the rail lock.

    5. Insert Screws:

    • Proceed to attach the light onto the compensator. Start by inserting one screw to facilitate the process, then continue with the remaining screws.
    • Continue inserting the remaining screws, ensuring they are snug but not overtightened.

    6. Secure the Screws:

    • Once all screws are in place, tighten all six bolts 5 inch-pounds to ensure the compensator is firmly attached.
    • If you don’t have a torque wrench, tighten all six bolts until they are fully seated, then an additional 1/8 of a turn to ensure they are fully seated and secure.

    7. Attach to the Firearm:

    • Depress the two wings on the rail lock.
    • Slide the rail lock back to release it from the compensator.
    • Slide the compensator onto your firearm's rail and lock it into place.

  8. Check Fitment:

    • Pull on the compensator to ensure it is securely attached.
    • If there is any noticeable wiggle or looseness, utilize the wedge block to add tension until the setup feels firm and secure.

  9. Perform a Test:

    • Finally, perform a quick test to verify that the installation is secure and functioning properly.
    • Slide the compensator back and forth to ensure there is no interference.
    • Verify there is a small gap (clearance) for proper function.

10. Completion:

    • Following these detailed steps will effectively assemble Sig Sauer P320-M18 Full Light-Mounted Compensator with the SureFire X300U-A Weapon Light or X300T-A Weapon Light.


Upgrading your handgun with a compensator requires a higher level of maintenance and care. Ensuring that it is installed correctly and checked frequently is critical for proper function and safety. 

Results may vary depending on the handler. Vantage Point Armory is not in any way responsible for the misuse of firearms or firearm parts/accessories or the results of such misuse. We highly recommend gun owners inspect parts and accessories frequently. This will help mitigate the possibility of accidents and malfunctions.

*The Vantage Point Compensator is intended for use on OEM pistols only - VPA does not guarantee function or reliability with aftermarket or modified guns

*The "P" latch on the Surefire X3000U-A must be used

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by Sig Sauer. Sig Sauer does not warrant or represent that this product is compatible with Archon Firearms pistols.

DISCLAIMER: Neither Vantage Point Armory, LLC nor this site are affiliated in any manner with, or otherwise endorsed by Sig Sauer. The use of “Sig Sauer” on this page is merely to advertise the sale of Sig Sauer pistols, parts, or components. Components and parts that do not specifically have Sig Sauer listed as the manufacturer are made by their respective company. Such parts may be intended for use with Sig Sauer components but are not produced by Sig Sauer. For additional genuine Sig Sauer products and parts visit