I have almost finished this (Pietta) project gun to show the modifications I have made.
It has a gas ring on the cylinder, frame modified to accept it, barrel shortened to 4-1/2 inches, Uberti dovetail front sight installed. A new latch for the cylinder pin of my manufacture, which includes a rammer plug and latch travel limit built in. A Ruger coil and plunger hand spring and new hand of 4140 steel made for longer life (not shown). This gun also has a Ruger coil mainspring and strut, but that may be overkill.
I have designed a cylinder pin latch to fit the (cast frame) Uberti as well, which uses the same latch but a different plug body.
Two versions of the latch assembly, the latest, version is easier for me to make. (It's the stainless one)
<center>
<img src="
http://i13.photobucket.com/albums/a293/rcflint/1stand2ndversion.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
The reshaped frame opening and the rammer plug shown
<img src="
http://i13.photobucket.com/albums/a293/rcflint/barrelthroatandrammerplug.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
Before and after
<img src="
http://i13.photobucket.com/albums/a293/rcflint/compare.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
Cyilinder with gas ring installed.
<img src="
http://i13.photobucket.com/albums/a293/rcflint/cylindergasring.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
Cylinder in frame showing cutaway portion of the frame.
<img src="
http://i13.photobucket.com/albums/a293/rcflint/gasringinframe.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
The hand spring screw as it appears on the Remington gripframe.
<img src="
http://i13.photobucket.com/albums/a293/rcflint/handspringscrew.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
Cylinder pin drawn forward
<img src="
http://i13.photobucket.com/albums/a293/rcflint/latchopendetail.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
Muzzle detail and front sight
<img src="
http://i13.photobucket.com/albums/a293/rcflint/muzzledetail.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
closeup of installed latch/plug assembly
<img src="
http://i13.photobucket.com/albums/a293/rcflint/rammerplugandlatchdetail.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
The parts
<img src="
http://i13.photobucket.com/albums/a293/rcflint/rammerpluglatchparts2.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
A Ruger mainspring as well, but probably overkill solution to the HEAVY Pietta mainspring.
<img src="
http://i13.photobucket.com/albums/a293/rcflint/reasonforstrangegrip2.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
The latch assembly, a drop-in.
<img src="
http://i13.photobucket.com/albums/a293/rcflint/sslatchassy.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
</center>