Strike Industries MASS DRIVER – Forward-Moving Pistol Compensator Design

Hrachya H
by Hrachya H
Strike Industries MASS DRIVER Compensator for Gen3 Glock Pistols (1)

Strike Industries has released a Gen3 Glock pistol compensator called Mass Driver. As you can expect from a new product made by this company, this is not just another compensator but it packs some cool features. By calling it forward-moving not only I mean that it is an advanced pistol compensator design but it actually moves forward upon firing! Let’s take a closer look.

Strike Industries MASS DRIVER Compensator for Gen3 Glock Pistols (4)

Besides compensating the muzzle rise and probably also mitigating the felt recoil due to the gasses redirected to the sides and upward via the slots cut into it, this muzzle device also works as a counterweight moving in an opposite direction of recoiling parts when the gun is fired. The gasses exiting the muzzle push the Mass Driver compensator forward and then it returns back thanks to its own return spring. Here is an animated image showing how the Mass Driver jumps forward when the gun is fired.

Strike Industries MASS DRIVER Compensator for Gen3 Glock Pistols (1)

Strike industries describes this design as follows:

The Mass Driver name is inspired by the idea of theoretical mass driver engines in space travel. By ejecting mass, an equal and opposite reaction is generated propelling the space vehicle forward. The Mass Driver Compensator is driven by the hot gasses expelled through the barrel after the round is discharged, and acts as a counter balance system to attenuate mechanical recoil.

Strike Industries MASS DRIVER Compensator for Gen3 Glock Pistols (13)

Unlike the majority of other pistol muzzle devices that are mounted on the barrel, the Mass Driver is attached to the recoil spring guide rod thus it does not alter the overall weight of reciprocating parts. By not being attached to any of the moving parts, the Mass Driver doesn’t compromise the reliability of the pistol. Another benefit of this design is that you don’t need to have a threaded barrel to attach this compensator to your Glock pistol.

The Strike Industries Mass Driver compensator is available in two size options – Standard and Compact. The Standard version fits Glock G17 and G31 pistols and the Compact model works with G19 and G32 Glocks. These compensators are CNC machined of steel and have a manganese phosphate finish. The dimensions of this muzzle device stay within the slide/frame dimensions at the muzzle end, making the pistols equipped with Mass Driver compatible with open bottom holsters. The chamfered edges also reduce the chances of snagging on your gear or garment.

The Mass Driver comp is a drop-in accessory not requiring any permanent changes to the weapon. The installation is a matter of replacing the original recoil spring assembly with the provided new recoil spring and guide rod and attaching the muzzle device and its spring to the new guide rod. Here is a video showing the installation process.

Strike Industries Mass Driver compensator is listed on the company’s website at an MSRP of $89.95. This product is available exclusively via Primary Arms. And if you visit the Primary Arms website, you’ll find these muzzle devices with a price tag of $79.99. According to the manufacturer, this is a 50 state legal product.

The Mass Driver Comps are shipped with the new recoil spring, guide rod, guide rod fitment washer, guide rod head nut, the compensator's internal return spring as well as with the installation Allen key and thread locking compound.

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Hrachya H
Hrachya H

Managing Editor Being a lifelong firearms enthusiast, Hrachya always enjoys studying the history and design of guns and ammunition. Should you need to contact him, feel free to shoot him a message at

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2 of 72 comments
  • Colonel K Colonel K on Oct 16, 2019

    The spring forces the comp back into battery against the frame, thus inducing recoil.

  • Jay Jay on Oct 24, 2019

    I'd be worried it may move a little. Baffle strikes are bad news.