Geissele Geissele AR-15/M4 Super Precision Scope Mount 34 mm Tube 0 MOA Extended Type 3 Anodized DDC. These mounts are available in either 30mm or 34mm tube diameter as well as a variety of lengths including standard extended and hyper extended. This allows you to get the perfect length for your chosen scope ensuring it fits on your rifle easily. While these scope mounts use the classic nut and bolt method for clamping to the Picatinny rail they use an updated design pioneered by Geissele. This means they are more secure as each nut and bolt combination provides 1400 pounds of clamping force which is more than any lever mounting arrangement. It also spans 7 Picatinny sections and uses 4 shear lugs to ensures the scope stays steady and zeroed even after repeated firing. Specifications for Geissele Super Precision AR-15/M4 Riflescope Mount: Manufacturer: Geissele Gun Rail: Picatinny Gun Make: AR Platform Cant: 0 MOA Gun Model: M4 AR-15 Condition: New Finish: Type 3 Anodized Country of Origin: USA Features of Geissele Super Precision AR-15/M4 Riflescope Mount: Improved Nut and Bolt Clamp Design Picatinny Rail Mounting Capability Type 3 Anodized Finish Package Contents: Geissele Super Precision AR-15/M4 Riflescope Mount What firearm models does the manufacturer say Geissele Super Precision AR-15/M4 Riflescope Mount is compatible with? The manufacturer suggests that Geissele Super Precision AR-15/M4 Riflescope Mount is compatible with AR-15 M4Geissele 05-405S: Geissele AR-15/M4 Super Precision Scope Mount 34 mm Tube 0 MOA Extended Type 3 Anodized DDC