M1SURPLUS Adapter Rail Mount - This Item Converts 3/8" Dovetail Grooves to Accept 7/8" Weaver Style Scopes and Scope Rings for Use with Diana Hornet GAMO Daisy Air Rifle and Tippman A5 98 Markers M1Surplus Adapter Rail Mount - This item Converts 3/8" Grooves To Accept 7/8" Weaver Style Accesssories Compatible With Indsutry Standard Weaver Style Scopes And Accessories Fits Most .22 Rifles, Air Rifles And Markers That Have 3/8" Dovetail Grooves Easy Bolt-on Installation