I tried the Buffer Technology shock buffers on my S&W 41 some years back. Not sure why, it just seemed like the right thing to do at the time. Reliability suffered on an already finicky gun, so I took them out pretty quickly.

I also used the Wilson Combat Shok Buffs on a couple of 1911 pistols. I didn't experience any problems, but they started looking rather chewed up after a while, so I also took them out, fearing they might cause problems if they came apart while shooting. However, the Buffer Technology units use a different material, not quite as soft or spongy as the Wilson things; they might hold up longer.

I'm not sure why the 3913 would need them. I've never heard/read of any alloy frame damage observed in these guns, even after many years of service. If you regularly use a lot of +P loads, a stronger recoil spring may be the best solution.

I have to agree...shock buffers do seem like a solution in search of a problem. I'd be interested to know how they work out.