Hogue makes replacement side panels and a wrap-around grip for the 22/45; my understanding is that 1911 grips need some mods to fit the 22/45.

 

A lot of grip choices in both the 22/45 configuration and for 1911 with a little modification.
Install a hammer bushing to allow for easier reassembly after take down and to allow your mags to drop freely. There are a couple manufacturers for the hammer bushing, all get good reviews. I personally purchased and installed a TandemKross hammer bushing. Their magazine bumpers are an excellent upgrade as well. And ammo!

 

Hi Pasemkr, welcome to the forum.

There are many grip options made specifically for the 22/45, as well as a an infinite number of 1911 grips that can easily be made to fit.

I personally went with a Pearce rubber grip insert with finger grooves and a set of cocobolo target grips. I would also suggest a hammer bushing (as was already mentioned), the "slingshot mod", and perhaps a Volquartsen trigger. You may also want to remove the LCI.

Have fun, stay safe.

 

I've got Pachmayr American legends on my Mk III 22/45, and I have the TandemKross Hammer bushing and LCI filler as well as their magazine bumpers. I also bored out the holes in the rubber portion of the grips and added my own Umbrella Corporation logo medallions. I also have an HTA Kestrel .22, makes for a very nice shooting experience.