All critical alignment features machined in one set up. Compatible with common .900-24 silencer mounts like the Q Plan-B and Rearden MFG Atlas. .30 caliber bore. 13/16 rear hex for easy installation and removal. CNC machined from 17-4 PH stainless steel. Heat treated to H900 condition. Substantial improvement in recoil reduction over OEM part. Minimal concussion. 360 degree port orientation-no shims required. 1.6-2.0 ounces, 1.7 total length