Colt old stock (1950)'s flat mainspring housing
ed brown beavertail
sig sauer safety
wilson combat hammer and sear/internals.
cw accessories guide rod, bushing, plug, springs, ignition kit (performance kit)
recover tactical grips
stock re-worked trigger (works better then aftermarket)
waiting for a crack to pop up in the slide to upgrade it and sights, these are amazing little 22's and they shoot very well.