Rock Island Armory Tac Ultra CS 1911

DPM Mechanical Recoil Reduction System for Rock Island Armory Tac Ultra CS 1911 3.62" Barrel

The DPM mechanism and spring should be installed with the OEM spring plug.

Within the kit are included 3 sets of 2 pieces external springs. 

1.0mm Wire diameter (extra soft) 

1.05mm Wire diameter (soft)

1.1mm Wire diameter (standard) 

**As we lead the evolution of recoil reduction technology, products may change versions (new design with different springs, with or without plugs, washers, etc.) without any prior notice.** 

Power Rates 

Slide on the battery (idle position)

1.0mm Wire Diameter: 

• Short Spring: 2.9kgs / 6.4lbs
• Long Spring : 3.1kgs / 6.9lbs

1.05mm Wire Diameter: 

• Short Spring : 3kgs / 6.6lbs
• Long Spring :  3.2kgs / 7lbs  

1.1mm Wire Diameter: 

• Short Spring: 3.1kgs / 6.9lbs
• Long Spring:  3.3kgs / 7.3lbs

Total force (Slide full open position) approx. :

With any 1.0mm: 5.5kgs / 12.1lbs

With any 1.05mm: 6.5kgs / 14.3lbs

With any 1.1mm: 7.5kgs / 16.5lbs

Overall Advantages

• Faster follow up shots
• Improved firing speed
• Slide and Frame Protection
• Elimination of jams
• Significant recoil reduction
• Better double-tap concentration
• Better control and greater accuracy

Lifetime Warranty. 

For changes to features, like comp set-up, threaded barrels, slide conversions etc., contact us via email at [email protected] before placing your order. In some cases, we need to determine whether a custom product is required.

Millions of our patented products are in service to military, law enforcement, sports and civilian firearms around the world.

Made in Greece – EU.