Tisas B9R 4.25" Gen 2 Cerberus Compensator Thumb Rest Mk2

The Underworld Arms Cerberus Compensator for the Gen 2 Tisas B9R Carry 4.25" DS 1911, is a compact triple port frame mounted compensator with superb efficiency and performance. This compensator is made for the second generation B9R with bull style barrel. 

The Cerberus uses concave gas diverters at the front wall of the expansion chamber to route gas into the two upward angled side ports and the top port. By using this concave diverter the gas retains more of its energy as it is redirected and more gas is trapped and redirected into the ports. The side ports are angled up at 68 degrees which creates a 44 degree arc of gas venting. 

This 50 state legal compensator is made for unthreaded barrels and is anodized black. This compensator has an ambi thumb rest lower with horizontal serrations that match the horizontal serrations on the slide release and thumb safety for a cohesive aesthetic. The holster we make compatible with this thumb rest lower. 

On most builds this compensator will require recoil spring tuning and we offer a spring tuning kit if your build requires it. 

Compatible holsters are available HERE

This compensator increases the dimensions of the firearm so it requires a dedicated holster such as the ones we make, or a universal holster such as the MSP Tier 1, and the blackhawk omnivore light bearing. 

Installation Video: Click Here

Everything you will need for the install is included: locking block, screws, Blue Vibratite 121 thread locker, and an allen key. 

Specifications

Material: 7075-T6 

Weight: 2.7oz

Length Overall: 3.75"

Length Added to Firearm: .825"