At the show this past weekend a dealer buddy of mine had a new 351C 22MRF on his tables. After negotiating a reasonable price I took it home. 7 shot alloy cylinder, alloy frame and barrel shroud a white bead front sight. It weighs next to nothing and I thought it was pretty cool, but when I got it home I discovered it's horrible trigger pull. I did not measure it but it was very heavy and gritty. I took the cylinder and hammer out and the trigger rebound was heavy but smooth.
I removed two coils from the rebound spring and the rebound was a little lighter but still rebounded very well. Next I took the hammer spring off the shaft and found what was causing the grittiness. The shaft had two sharp edges along one side that were very rough, causing the spring to rub on them as the spring contracted and expanded. I took a file to the edges and finished them with 220 and finer until the shaft was smooth, like it's supposed to be. Took a couple coils off the spring and put it all back together. Hammer is snappy and smooth and the rebound is very positive. All in all the trigger pull is really good for this little DA only revolver. Great little pocket gun. It's too bad S&W didn't take the time to work out this problem at the factory before they shipped it. The face of the cylinder indicated that two rounds were test fired from adjacent chambers, which, in my opinion was not enough.
I removed two coils from the rebound spring and the rebound was a little lighter but still rebounded very well. Next I took the hammer spring off the shaft and found what was causing the grittiness. The shaft had two sharp edges along one side that were very rough, causing the spring to rub on them as the spring contracted and expanded. I took a file to the edges and finished them with 220 and finer until the shaft was smooth, like it's supposed to be. Took a couple coils off the spring and put it all back together. Hammer is snappy and smooth and the rebound is very positive. All in all the trigger pull is really good for this little DA only revolver. Great little pocket gun. It's too bad S&W didn't take the time to work out this problem at the factory before they shipped it. The face of the cylinder indicated that two rounds were test fired from adjacent chambers, which, in my opinion was not enough.