I bought my Prodigy as an introductory way to shoot LO. Initially I planned on a magwell, trigger (I prefer flat) and a tool less guiderod. ~$150.00. I then decided on new firing parts (hammer, sear, disco, sear spring)~$200.00 had a hammer strut (non-mim) in my parts box. Finally I added an xl firing pin $12.95, FP spring and 9# recoil springs (also had these in spares but are $7.95 if need to purchase. Still need MS housing and internals.