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Old April 8, 2020, 09:41 PM   #13
Senior Member
Join Date: September 15, 2005
Location: Oregon
Posts: 1,023
Fairly common issue with the X39 AR (AR47?) Midway even mentions (or at least used to) that it is common to have trouble with steel case mil-spec ammo. I 'enhanced' my own, it wasn't a spring issue but the firing pin needed to be able to reach just a tiny bit deeper. That said I would also not use anything but a standard hammer spring either, but its been 100% for a few thousand rounds of Wolf/Tula/Red Army fodder since the modification.
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