@MDT_Josh
@padom ,
So I've been dorking around with the MDT 6BR mag for the Valkyrie and figured I'd post the work/discussion here to broaden the input.
The MDT polymer mags have been giving me issues, so I went ahead and ordered a 6BR MDT mag, thinking that at least I can adjust those feed lips. After playing around with it (closing the lips lisghtly) the mag feeds well, if the round is seated correctly against the feed lips. That being said, the 3rd rd of the mag almost always causes issues (this is a mag with 6 rds loaded).
It would appear that the ammo column is what is binding. As the bolt is cycled and ammo advances up the magazine, and the column appears to be getting pushed forward. Then, a cartridge gets hung up on that deep rib (just ahead of the feed lips), which then causes the top round to dip forward slightly. A sharp smack to the mag (hey "tap, rack, bang" apparently is still a valid reaction to malfunctions) almost always solves the problem (rounds get bounced, and advance properly up the magazine walls). Looking at the follower, I'm wondering if the rear of the follower just needs to be raise a smidge(?) to keep the cartridges angled up, to prevent the binding with the rib. Ironically, once the third round is fed (malfunction drill needed or not), the mag feeds flawlessly.
Thoughts?
FWIW, the metal 6BR mags are slightly larger, and therefore tighter fitting, than the polymer ones....
@padom ,
So I've been dorking around with the MDT 6BR mag for the Valkyrie and figured I'd post the work/discussion here to broaden the input.
The MDT polymer mags have been giving me issues, so I went ahead and ordered a 6BR MDT mag, thinking that at least I can adjust those feed lips. After playing around with it (closing the lips lisghtly) the mag feeds well, if the round is seated correctly against the feed lips. That being said, the 3rd rd of the mag almost always causes issues (this is a mag with 6 rds loaded).
It would appear that the ammo column is what is binding. As the bolt is cycled and ammo advances up the magazine, and the column appears to be getting pushed forward. Then, a cartridge gets hung up on that deep rib (just ahead of the feed lips), which then causes the top round to dip forward slightly. A sharp smack to the mag (hey "tap, rack, bang" apparently is still a valid reaction to malfunctions) almost always solves the problem (rounds get bounced, and advance properly up the magazine walls). Looking at the follower, I'm wondering if the rear of the follower just needs to be raise a smidge(?) to keep the cartridges angled up, to prevent the binding with the rib. Ironically, once the third round is fed (malfunction drill needed or not), the mag feeds flawlessly.
Thoughts?
FWIW, the metal 6BR mags are slightly larger, and therefore tighter fitting, than the polymer ones....