I rebuilt my 1922 1st series Woodsman to accommodate a Burris fastfire recently. As it had already been heavily modded there was no problem. I d&t my homemade rib for a piece of rail after removing the iron sights. I used another slide that had been refinished to mount my slide racker into its wide dovetail. I will paint the bare steel with high heat enamel and cook. The mainspring housing is a 2nd series with a grip adapter, the grips are Woodsman military grips. I was getting light strikes so I found a longer ms housing spring and gave the slide a good cleaning. Runs fine now and hits where you put the dot. Planning to use it and my Seekins/ CMMG .22 AR at a local ZSA club’s zombie matches. Fits just fine in my thigh rig. I had been using a stock 2nd series 4.5 MT but I hope the Burris will speed up my shots and make me a little more competitive with those young Cherry Point Marines.