I am in the Process of converting a .22LR Ruger Standard auto 4-3/4" barrel MKII Pistol to Center Fire and .25ACP with about an 8 inch long Barrel.
1. The Bolt conversion is complete and was done by John Taylor of "Taylor Machine" in Payllup, WA.
2. The barrel is machined ,again by John Taylor, from a left over piece of Lothar Walther .25 Auto/6,35 Browning Cr-Mo Pistol Barrel blank; this is left over from my 10-5/8 inch long Ruger Single Six Conversion Barrel. The Barrel will have a Long tapered form with a Front sight boss like the Ruger typical one on the
removed barrel.
3. I am working on jigs and form blocks to rework a Beretta "950" .25ACP magazine body's feed lips to match the angle of my Ruger .22LR magazine.
4. I already have roughed out the Welding jig body (two pieces of 1/8x1 inch Copper plus a piece of Sheet steel 'ground' to fit the Interior of the Beretta magazines closely, but with a sliding fit). I am still working out the clamping methods to hold everything in alignment for welding.
5. I purchased a "Volquartsen" extended magazine catch/release to install in my MKII grip frame.
6. the Used MKII came to me with a "Volquartsen" Molded 'Rubber' Target Grip that fits my hand well and extends past the bottom of the Grip frame with a 'shelf' for the heel of my hand and another for my thumb.
7. The Barrel is chambered with my custom .2795" diameter cylindrical Body finish chamber reamer purchased from "JGS Precison" (drawing title .25ACP WS). John Taylor has test fired it already, before sending the barrel out of Blued finish.
The new barrel will be finished Blue and has a threaded muzzle with a muzzle thread protector and a separate Threaded Muzzle Crown Protector/guide for my cleaning rod.
Added info: I was advised by My Local Gun Shop that if I assemble the Barrel into a completed pistol it will be Illegal under Current California Laws, Regulations, Rules, and Ordinances; so I turned the muzzle threads off before assembly. this is 'witnessed' by the 'White' band of bare smooth metal in front of the Front Sight boss. I hope no one mistakes it for a "TOY" gun, chuckling.
Eventually I will have the rear, fixed, sight replaced with an Adjustable Ruger Target Sight.
I do realize this project is not suitable for CAS use but I felt it might be of Passing Interest to the R.A.T.S. group.
Chev. William, R.A.T.S. member 736