The front sight looks to be a post. No joy for the DIY'er. Rear looks to be a standard GI. Typical hump & bump.
Sights on a "mouse gun" are the least used item and IMHO, irrelevant to accuracy. This is a PD weapon and as such, a point shooter. IOW, a Fight Shooter's gun. If you want to competitive shoot, get a gun with a real barrel!
My best experience for the grip safety is a Wilson "Drop in". It really was a drop-in. (See photo below)
Beavertail Grip Safety | Drop-In | Commander | Blue-Wilson Combat
Changing hammers is not something for the novice to DIY. You can go from crappy trigger pull to full auto in just a few file swipes! BATFE loves those guys and rewards them with a visit to Club Fed.
The Mainspring housing is a simple swap and with the "mouse" gun the addition of a S&A mag-guide adds some much needed purchase real estate. (See photo below)
Smith & Alexander - "The Mag-Guide People"
Call Aaron at Trip Research (877.837.9445) and tell him what gun you have and ask him to build you an 8 round, Gen II Cobra Mag w/base pad. Tripp's are
the best 1911 mags on earth and this will also give your pinkie some aforementioned purchase. (Tell Aaron one like canebrake's) Once you use this mag you will be back ordering more. Read this:
Tripp’s Cobra Magazine Test
My Defender with an 8rd Cobra Mag and Alloy Base Pad for the Officer model 1911.
Hey, you asked.....and I'm Olympic at spending other people's money!