I have a Marvel 22 conversion for a 1911 with adjustable sights. I wanted to mount a red dot sight to the pistol for open division in Steel Challange. Marvel wants $92 for the top rail that will accept rail mount sights. A trip to the local Iron and Metal yard and $2.50 bought me a piece of aluminum so I could machine one. First thing I needed was a 5/8 ball mill to cut the barrel channel. God old ebay provided a new one shipped for $12.50. Took some measurments off the top piece that had the fixed sights and went to work. About an hour and a half later I had a top rail made, mounting holds drilled to attach to the barrel and the C-more holes drilled. Cleaned it up and went to the back garage where I have a Harbor Freight powder coat system. Using flat black powder paint and a 20 minute bake at 400 I was realy to mount it up. Had to make a trip to the hardware store to get proper Allen head mount screws (4-40) and mount it up. 10 round of ammo and was sighted in at 20 yards. A worthwhile couple of hoursDon't know why it is upside down but if I touch the image it bring it up correctly