Anyone have any helpful advice? I purchased a MP5/40 (has the bolt hold open cut out) SEF Navy style lower for my HK94 clone but once I put my FCG inside and put it altogether the weapon keeps binding/locking up on the ejector lever. I'd like to have the Navy style lower on my MP5 but getting frustrated that just the Trigger Housing alone is creating this kind of jam. I thought they should be/were compatible, but maybe I'm mistaken. Can anyone school me on this?
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