Heres a couple of DIY builds. Downside of parts guns is poor resale
(talking from experience). But, can build as time and budget allow.
Being a lefty with small hands, an ambi safety and short trigger is a
must. One on top is a 45, RIA stock upper, caspian frame, name
brand frame parts. Bottom is a 9mm, RIA stock upper, essex frame,
colt or better frame parts. Bought the uppers and grips from a couple
of nice members here. Will eventually get a checkering jig.