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TM M4A - Hop up cover/wobbly mag

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Old January 16th, 2012, 00:24   #1
lyphe
 
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TM M4A - Hop up cover/wobbly mag

Hey all. I just purchased a TM M4A and i've noticed that the hop up cover is always open, almost as if the spring was put on backwards. I've only seen one other M4, however it's hop up cover was always closed unless you pulled it back, then upon release the spring would shut it closed.

Any idea why this is happening? I presume it was done on purpose by the previous owner. Should i try to figure out how to reverse the spring and ensure its always closed or not worry about it?

The second issue i'm finding is that the mag is a little wobbly and seems to cause the semi-auto to lock. I've read a thread on why AEG's lock on on semi-auto (due to not pulling trigger all the way back). But it seems like if i hold the mag firmly in the issue doesn't occur. Thoughts?

Thanks in advance guys!
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Last edited by lyphe; January 16th, 2012 at 00:30.. Reason: title
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Old January 16th, 2012, 08:05   #2
coach
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Does it not stay closed until you pull the charging handle?

It is designed to pop open when you pull back the charging handle. Makes for easy hopup adjustments.

If you want it to stay closed, don't pull the charging handle!
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Old January 16th, 2012, 19:03   #3
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Looks like this was done intentionally by the previous owner. Waiting to find out what the advantage of always having it open is.

Seems like i've still got the lock-up issue despite fully pulling back on the trigger and holding the mag in to eliminate the mag variable. Perhaps i'll ask one of the pros this Friday at TTAC (hopefully there's a game going on!).
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