3.05 total length takes 13.7 barrels to 16.1 for legal rifle barrel length requirements. 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 flash reduction over OEM part. Designed to serve as sacrificial blast baffle. Square shoulder. 360 degree port orientation-no shims required. 3.5 ounces, 3/32 pin compatible