XTS HMR Firearm Hammer Black XTS HMR. With a Matte Black Finish the XTS M15/10 HMR Hammer also features a wrench flat for easy installation and a solid steel construction. There are many good reasons why you want a rifle but you do not want a hammer. Having a good solid hammer is better than an AR 15/10 hammer but with so many models and variations of aftermarket hammers on the market it can be hard to keep up with a high-performance hammer. Build your Rifle w/ XTS M15/10 HMR Hammer Fits AR-10 & AR15. Specifications for XTS-HMR Firearm Hammer: Manufacturer: XTS Color: Black Finish: Matte Fabric/Material: Steel Quantity: 1 Country of Origin: USA Gun Model: AR-10 AR-15 Features of XTS-HMR Firearm Hammer Mil-Spec Solid Steel Matte Black Finish Fits AR-15/AR-10 Package Contents: XTS-HMR Firearm Hammer What firearm models does the manufacturer say XTS-HMR Firearm Hammer is compatible with? The manufacturer suggests that XTS-HMR Firearm Hammer is compatible with AR-15 AR-10XTS XTS-HMR: HMR Firearm Hammer Black