Vital is correct. The OP mentions that the gun looks like this with the hammer all the way back. You will need to slot the hammer deeper, so the sled can move further back before bottoming out the hammer on the IVG or whatever.
To confirm this you can just take the cocking rod off completely and then bring the sled back as far as it will go. If the bolt is still failing to clear the breech, then you need to slot the hammer deeper.
This is assuming the bolt and sled are made correctly in the first place. the bolt could just be too long.
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Last edited by Cunha; 05-06-2014 at 06:20 PM.