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Yes, this is drilled and tapped for optic/scope mounting.

Yes, (Specifications and Features): - Ruger Mark IV 22/45 Semi Automatic Pistol 40107 - .22 Long Rifle - 5.50" Bull Barrel - 1:16" Right Hand Twist Rate - 6 Groove Rifling - 10 Round Magazine - Checkered Synthetic Grips - Fixed Front Sight - Adjustable Rear Sight - Polymer Grip Frame - Simple One button Takedown - Upper Receiver Tilt's up and off the grip frame without the use of tools - Drilled and Tapped for Weaver/Picatinny Style Rail - Ambidextrous manual safety - Magazine Disconnect Feature - Overall Length 9.75" - Overall Width 1.22" .

Yes, you got it exactly.

Hi Mark, Yes it is Here are the Specs. Specifications and Features: Ruger Mark IV 22/45 Semi Automatic Pistol 40107 .22 Long Rifle 5.50" Bull Barrel 1:16" Right Hand Twist Rate 6 Groove Rifling 10 Round Magazine Checkered Synthetic Grips Fixed Front Sight Adjustable Rear Sight Polymer Grip Frame Simple One button Takedown Upper Receiver Tilt's up and off the grip frame without the use of tools >>>>>>>>Drilled and Tapped for Weaver/Picatinny Style Rail-------- Ambidextrous manual safety Magazine Disconnect Feature Overall Length 9.75" Overall Width 1.22" Overall Height 5.50" Overall Weight 34.4 oz Matte Black Finish

Yes it drilled and tapped for a rail (not included available from ruger)