IMO, M93 is the cheapest .22 pistol on the market, but the quality is also poor, I cut my finger cleaning the gun, I will try to remember to wear rubber from now on (LOL). My review on this gun is mixed. Upon on its arrival, cleaned, lubed, took the range, American Eagle Red Box 40gr solid, 3 mags. The gun had 1 FTF and 2 mis-fire on the first mag, it fired 2nd mag without issue, then 3rd mag with couple of the slam fire and 1 FTF, I field striped the gun and noticed the firing pin screw was very loose, tighten it up, SLAM fire issue is fixed, but FTF or mis-fire still happens, it is hit and miss, 1 mag is good, 1 mag is bad, (it is not the mag as it is happens with each mag soon or later). When I shoot, it has less FTF/mis-fire, but when my son shots, mis-fire or FTF happens quite often, sometime even 5 out of 10 rounds.
Finally, I realized that there was little play in the Main Spring Housing (the back piece on the grip), when I squeeze it hard, it felt like the main spring housing moves towards the front a bit and I can shoot the whole mag without any issue. My son doesn't have the strength to squeeze it hard, so mis-fire/FTF happens. I took a piece of thin metal wire and round it up and pushed it between the Receiver and the main spring housing, and now the gun functions much better. Hopefully this will help if anyone having the same issue.
Last post by "Ganderite" might be talking about the same thing, it basically increases the spring tention in the Main Spring Housing".
""-- Mine had a lot of missfires. I increased the tension on the hammer spring and now no missfires. ""
Here is a link to the COLT Woodsman parts diagram, you can see what parts we were talking about:
http://www.google.ca/imgres?imgurl=...sman+Parts+Diagram&um=1&hl=en&sa=N&tbs=isch:1