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Most likely it will not fire any surplus ammo due to hard primers. i do have very good success using a orig firing pin spring when using blanks though...get a nice light smooth firing sequence..but thats with blanks only. Doug

The orig firing pin trick works...but not with most surplus ammo. The surp ammo had the typical hard primers and i found that using orig springs does not have the strength to set them off. Firing blanks is a whole diff story as blanks use a soft primer and the orig spring works well with those.

I have now broken the little arm/sear, to the rear of the bolt 3 times, and TNW wants 125$ for the complete assembly?! I tried to get one made from my machinest but he said they made the part so small that it will continue to break no matter what metal is used? I found the guy on here who was sellin...

I just broke my charging handle and am looking to buy another. GB has them for $125+ seems a little steep to me? If anyone has one let me know. You can email me at: fireater40@rcn.com thanks, Doug

I had the same problem, and replaced the TNW spring with an orig 34 firing pin spring. It lightened it up a lot, but it may not fire some surplus rounds due to them having a harder primer? If I had some rounds that did not fire, I put them back on a belt, and they all fired the second go around? Doug