Ruger MKII/MKIII 22/45 Magazine Bumper Pads...Dump Your Empty Mag, Then "BUMP" One of These for Fast, Secure Reloads!- Made of precision machined (solid) aluminum, this 22/45 magazine base bumper pad looks and functions just like the magazines used by speed shooting 1911 competitors. The solid aluminum construction adds weight/mass to your mags so they fall away readily and have a hefty, quality "feel" when you handle them. Once you install it on the base of your magazine, you insert a fresh (loaded) magazine and then "Bump" the base with the palm of your hand to be sure it is fully inserted, locked, and loaded. Never has 22/45 magazine insertion been this definite and reliable... And It Looks Cool, Too! - Magazine Base Pads are common in action pistol shooting because they give more reliable seating of magazines under speed loading situations. But with the Ruger 22/45 pistols, these magazine base pads are especially nice due to the recessed design of the original Ruger 22/45 magazine system.Installation is as simple as disassembly of the magazine for cleaning... Just swap the Base Pad with the original 22/45 factory mag base. When you're done you'll have a more functional and better looking mag!