M9a4 centuriom improvements?

*I need some leads on what improvements if any I can make to my beretta. Also any components that are plastic that I can switch to steel that I may have not listed?

*TLR7HLX

*Stainless steel threaded barrel

*Lok grips

*Stainless steel grip screws

*LTT trigger job in a bag

*LTT #13 spring

*Wilson combat stainless steel guide rod

*Wilson combat recoil spring

*Wilson combat Shok buff

*Extended mag release

*Black beard trident trigger

*Wolff trigger conversion unit

*3x Mec-Gar mags with NP3 coating

*NT7+ Frame

*NT7+ internals

*QPQ slide

*I won't install a comp, barrel porting, magwell, nor RDO/optic