Herrington Arms HCRXM Ruger Rxm Compensator Flat Dark Earth. We engineered the comp with side fins so it has a seamless design with the RXM slide. The HCRXM will work with the stock springs provided your gun has gone through recommended break in period of 500 rounds factory new ammunition is used with the threaded barrel you intend to use with the firearm before installing a compensator. When testing this compensator we have data showing it mitigating 28percent muzzle flip reduction depending on what 9mm load is used. Specifications for Herrington Arms HCRXM Ruger Rxm Compensator: Manufacturer: Herrington Arms Fabric/Material: 7075 Aluminum Gun Make: Ruger Gun Model: Ruger RXM Features of Herrington Arms HCRXM Ruger Rxm Compensator Designed to work with most 1/2-28 threaded 9mm barrels. Will fit in most open bottom holsters. We use Sierra Defense Tier 1 Concealed and Safariland. NOT COMPATIBLE WITH BAR-STO KKM OR EFK BARRELS Blems are cosmetic ONLY. They will function as normal - May have nicks dings pitting machining marks chips discoloration etc. AMMO DISCLAIMER: We DO NOT recommend using plated bi-metal or frangible ammo in ANY of compensators. Doing so will void the warranty and we will not cover or replace the comp if there are any damages. Package Contents: Herrington Arms HCRXM Ruger Rxm Compensator 5/64 Allen key Steel replacement 8-32 set screw What firearm models does the manufacturer say Herrington Arms HCRXM Ruger Rxm Compensator is compatible with? The manufacturer says that Herrington Arms HCRXM Ruger Rxm Compensator is compatible with Ruger RXMHerrington Arms HCRXM-FDE: HCRXM Ruger Rxm Compensator Flat Dark Earth