StealthyBlagga Posted April 17, 2015 Share Posted April 17, 2015 I just put together an upper using a Sun Devil billet upper receiver and a Voodoo Innovations low-mass carrier. For some reason the ejection port door barely holds in the closed position when the bolt carrier is forward... the slightest shake of the rifle and it pops open. When the bolt carrier is locked back, the port door is secure, so I suspect this is something to do with the dimensions of the Voodoo carrier in this area. To be clear, this is definitely not the biggest issue in my life, and will not in any way impair my use of the rifle, but I wanted to see if anyone else had encountered this phenomenon. Link to comment Share on other sites More sharing options...
rlillyskygod Posted April 17, 2015 Share Posted April 17, 2015 (edited) Try removing the bcg test door with it removed. Make sure it is the bcg causing the problem. Edited April 17, 2015 by rlillyskygod Link to comment Share on other sites More sharing options...
Shooter115 Posted April 17, 2015 Share Posted April 17, 2015 I have the same carrier in one of my rifles and don't have this issue. Link to comment Share on other sites More sharing options...
MickB Posted April 17, 2015 Share Posted April 17, 2015 Check the cutout in the BCG. I also have a "tight" port door you can try to see if that will solve your problem... Mick Link to comment Share on other sites More sharing options...
StealthyBlagga Posted April 18, 2015 Author Share Posted April 18, 2015 Try removing the bcg test door with it removed. Make sure it is the bcg causing the problem. Like I said, BCG locked back = no problem. BCG closed/in battery = problem. My guess is that the BCG is stopping the port door from fully closing, so the detent is barely clnging on by its finger nails. I may look closer at the detent. Link to comment Share on other sites More sharing options...
IntenseImage Posted April 18, 2015 Share Posted April 18, 2015 Carrier fully forward? Hit the FA and try again Link to comment Share on other sites More sharing options...
StealthyBlagga Posted April 19, 2015 Author Share Posted April 19, 2015 (edited) I think it is TOO FAR FORWARD. It looks like the rear edge of the bolt carrier recess is just kissing the edge of the ejection port door detent housing. I need to look more closely and make some comparative measurements with other-brand carriers and ejection port doors, and try other carriers in this upper. Hopefully I will get to this tomorrow. Edited April 19, 2015 by StealthyBlagga Link to comment Share on other sites More sharing options...
Lazr111 Posted April 20, 2015 Share Posted April 20, 2015 I have the same phenomenon with my AP low mass BCG. It bothers me, but not enough to look into it [emoji14] Link to comment Share on other sites More sharing options...
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