Firing Pin Spring ?

[Chuckindenver]

try this...
clean it with brake parts cleaner, make sure you spray down the back of the bolt as well, let dry, and oil, then try it again..
unless the rifle was stored for years cocked, likely its not tired.

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[Diamond John]

I have GI springs that are new in cosmolene. I'll give you one for the cost of postage if that is your problem. Try cleaning as Chuck suggested.

[Hylander]

Did the cleaning & lube, no change.
Went to the range, it fires but I can tell the delay in striking.
Checked against another 03A3 that works fine.