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Posted: 9/26/2011 8:21:06 AM EDT
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I bought this upper a while ago and after having some minor problems this upper works flawlessly, but not with the fifty rd drums. I have three drums and have tried all of them and the upper will not fully chamber a rd.
The bolt does not close all the way. These are Blackdog drums and work perfectly in my model 1 sales upper but they also do not work very well in my sig 22 although with the sig it will fire some of the rds. but not if I load 50 rds. Any help will be appreciated. |
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Sounds like the bolt may be hitting on the feed lips. Tolerance issues I would imagine. You may be able to take a little off the feed lips. I would make sure that is whats hitting first.
Also, check to see if the bolt has the 45 degree angle cut on the front. Dave N |
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I looked and could not see a 45 degree angle cut on my bolt. I hate to do any adjustments to these mags since they work flawlessly in my model 1 sales upper.
These drums are a lot easier to load than the regular mags and like I said they have preformed flawlessly for over 2k rds each in all three mags. |
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