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Old 10-12-2013, 5:49 AM
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12voltguy 12voltguy is offline
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Quote:
Originally Posted by motorwerks View Post
That's my understanding too, with a bullet button it's good to go, without being pinned. I have to say I had to think a lot about that though as I built my upper. As I understand it it has everything to do with "removable magazine" in other words if you fixed the magazine into a 1911 you could have a threaded barrel on it.
correct
a BB makes it a "FIXED" mag
& because the mag is outside the grip,it must be "fixed" here & 10rd or less