You need to understand the origins of the half cock and what it's original application was, do a little bit of digging and here are a few hints;
> It is unique to NZ?
> Enfield?
> Cock on open or close?
Applying it to a T3 or any modern rifle you have effectively used a solution for a problem that doesn't exist and what's worse in this instance created further problems (by using a "gunsmith", qualified or self-qualified?).
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