I sat down tonight with newly-acquired HS lower, RRA lower parts kit, RRA 2-stage trigger, and A2 stock, and I browse to to ARFcom and read up on how to do the lower receiver assembly. I get all my parts figured out. I get ready to put the mag catch/spring/button into the receiver, and try to screw the button onto the catch first, just to make sure it threads on correctly. But it doesn't.
I tried several times, very gently, to get the button to screw onto the catch, but it won't go on more than 1 or 2 turns before it hangs up. If I try any harder I'm sure it will bugger the threads. I've tried the button from both sides (flat and serrated) and it's the same -- won't go on.
Any idea what the problem is? It's like one is course thread and the other is fine or something... Should the button spin easily onto the catch, or is supposed to be really really tight like this? Thanks for any advice.
I tried several times, very gently, to get the button to screw onto the catch, but it won't go on more than 1 or 2 turns before it hangs up. If I try any harder I'm sure it will bugger the threads. I've tried the button from both sides (flat and serrated) and it's the same -- won't go on.
Any idea what the problem is? It's like one is course thread and the other is fine or something... Should the button spin easily onto the catch, or is supposed to be really really tight like this? Thanks for any advice.

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