Beretta PX4 Storm Rail-Mounted Compensator

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. 

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.

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

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

Step-by-Step Instructions for Assembling the Vantage Point Beretta Px4 Storm Rail-Mounted Compensator to a PX4 (video instructions linked here):

This guide introduces our new system for locking the Rail-Mounted Compensator to the frame of a PX4. Initially, we used nylon tip screws for attachment, which worked effectively. However, we are committed to continuous improvement, so we have developed an upgraded locking system using a lock bar and two extended-tip set screws.

The new system uses a lock bar with counterbores machined inside it. Two extended-tip set screws interlock with the lock bar to provide a more solid and centered fit.

Before you begin, ensure you have the following:

Beretta Px4 Storm Compact / 9mm & .40 Cal Model:

• VP Armory Beretta PX4 Storm Compact Rail-Mounted Compensator
• Two extended-tip set screws (included with Compensator)
• Lock Bar (included with Compensator)
• Torque Wrench with 3/32” Allen Key (recommended) or 3/32” Allen Wrench
• Beretta PX4 Storm Compact / 9mm & .40 Cal
• Loctite
• All screws must have a medium-strength, medium-to-high temperature threadlocker applied in accordance with their manufacturer's instructions. We recommend a small application of Green Loctite 290 on each screw. Blue Loctite 246, 242, or 248, are also acceptable if you intend to remove the compensator more regularly, but these products are more likely to loosen under an aggressive firing schedule.

Beretta Px4 Storm Full / 9mm & .40 Cal Model:

• VP Armory Beretta PX4 Storm Full (9mm & .40 Cal) Rail-Mounted Compensator 
• Two extended-tip set screws (included with Compensator)
• Lock Bar (included with Compensator)
• Torque Wrench with 3/32” Allen Key (recommended) or 3/32” Allen Wrench
• Beretta PX4 Storm Full (9mm & .40 Cal)
• Loctite
• All screws must have a medium-strength, medium-to-high temperature threadlocker applied in accordance with their manufacturer's instructions. We recommend a small application of Green Loctite 290 on each screw. Blue Loctite 246, 242, or 248, are also acceptable if you intend to remove the compensator more regularly, but these products are more likely to loosen under an aggressive firing schedule.

Beretta Px4 Storm Full / .45 ACP Model:

• VP Armory Beretta PX4 Storm (.45 ACP) Full Rail-Mounted Compensator
• Two extended-tip set screws (included with Compensator)
• Lock Bar (included with Compensator)
• Torque Wrench with 3/32” Allen Key (recommended) or 3/32” Allen Wrench
• Beretta PX4 Storm Full (.45 ACP)
• Loctite
• All screws must have a medium-strength, medium-to-high temperature threadlocker applied in accordance with their manufacturer's instructions. We recommend a small application of Green Loctite 290 on each screw. Blue Loctite 246, 242, or 248, are also acceptable if you intend to remove the compensator more regularly, but these products are more likely to loosen under an aggressive firing schedule.

1. Prepare the Firearm:

• Ensure the firearm is unloaded before proceeding.

2. Prepare the Compensator:

• Ensure your rail is clean.
• Place the lock bar inside the slot on the bottom of the rail, making sure it is as square as possible. Some adjustments may be necessary.

3. Sliding the Compensator onto the Rail:

• Carefully slide the compensator onto the rail and ensure the holes in the lock bar line up for proper alignment. You may need to make small adjustments to get them to align correctly. 

4. Account for Variations:

• DO NOT FORCE THE COMPENSATOR ONTO THE RAIL – IF IT IS TOO TIGHT OF A FIT CONTACT US. IF YOU FORCE THE COMPENSATOR ONTO THE RAIL, YOU COULD DAMAGE THE RAIL.
• Understand that PX4 frame molds may vary, impacting the fit of the compensator.

5. Set Screws:

• The compensator comes with two extended-tip set screws.
• The extended-tip set screws will help center the lock bar.
• Apply Loctite to the set screws before inserting them.
• Start set screws by hand.
• Insert the set screws until they are finger-tight and seated correctly. The set screws should be below the surface of the compensator. If they stick out, the extended-tip set screws are not engaged with the lock bar and are not properly inserted.
• *If the extended-tip set screws are NOT inserted into the lock bar, this will result in damage to your firearm during firing.
• Use a torque wrench set to 5-6 inch-pounds to tighten and secure the set screws. If using a torque wrench, set to 5-6 inch-pounds, ensuring the set screws are snug but not over-tightened, preventing any manipulation of the compensator. DO NOT OVERTIGHTEN. The results of overtightening the set screws will draw the compensator out of alignment with the bore and WILL RESULT IN A BAFFLE STRIKE.
• If not using a torque wrench, ensure the screws are just underneath the surface of the bottom of the compensator and fully seated into the lock bar (approximately 1/8” turn). DO NOT OVERTIGHTEN. The results of overtightening the set screws will draw the compensator out of alignment with the bore and WILL RESULT IN A BAFFLE STRIKE.

6. Cleaning and Final Checks:

• Wipe off any excess Loctite to keep the area clean.
• Double-check the alignment and tightness of the compensator to prevent any baffle strikes or misalignment issues. The fit should be firm with no movement of the compensator.

7. Marking the Screws:

• Use a paint pen to mark your screws. This helps you track if they back out over time. Regularly check the screws, similar to how you would with an optic or other attachments on your gun.

8. Completion:

• By following these steps, you can effectively assemble the Vantage Point Rail-Mounted Compensator to your PX4, ensuring a secure and reliable fit.

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. 

How to Clean Residue from Your Firearm & Compensator

Residue buildup is completely normal—it’s just carbon and fouling left behind from firing. Over time, it can collect on your firearm and compensator, especially around muzzle devices. The good news? It’s easy to clean off, and it doesn’t damage or remove your Cerakote finish when handled properly.

Important note: We’ve seen cases where people try to scrub off the residue too aggressively, which actually ends up polishing the carbon rather than removing it. This can give the illusion that the Cerakote is coming off—but it’s really just shiny residue left behind.

Regular maintenance keeps your setup performing smoothly and helps prolong the life of your gear. In this guide, we’ll walk you through how to properly clean that buildup and get your firearm looking and functioning like it should.

Click here to view our recommendation on how to clean residue from your firearm and compensator. 

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