If you want to use accessories with an M4 carbine this Gun Rail Mount is the perfect piece to add to your firearm. The 22mm rail mount is crafted out of an aluminum alloy that is highly durable but also light in weight. Precision machined to ensure that it is a perfect fit the accessory can be installed quickly and used to hold any type of rail accessory to create a rail interface system. With the gun rail mount you can attach any type of laser scope a bayonet tactical lights reflex sights and more. Order this high quality gun accessory today. Normal 0 7.8 ? 0 2 false false false EN-US ZH-CN X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:????; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri""sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} If you are looking for a rail that fits under an m4 carbine this is what you need. The rail mount is made of high quality aluminum alloy. The precise design makes it easy to install and fit your gun perfectly. The rail mount is a great accessory for your gun. - Made with aluminum alloy of high quality - Precision machined - Easy installation - Rail type: 22mm