Cranky ZB-39 Mags (ideas)?

[Peter Laidler]

It might be absolutely nothing to do with what I'm going to say but worth bearing in mind........ One of the interesting things about the Bren gun and the magazine feed was that unlike some guns before it, the feed horns on the breech block are fixed and as a result of this, when the top round has been pushed from the magazine, the next round is pressed down into the feed position. All well so far...., but........

When the top round has fired and the breechj block is now in cock mode, returning to the rear, the fixed feed horns now LIFT the whole stack of rounds in the magazine. So what you have in effect within the Bren magazine AND YOURS of course, is the whole stack of rounds constantly being not only pressed DOWN, but being lifted up as well. Albeit just a bit, but they are! On a Breen, this has the effect of constantly shifting the rounds making any internal magazine stoppage (except the rim-behind-rim scenario) a rare occurrence.

This is VERY interesting to watch in a skeletonised magazine on high speed video as they jump up 3/16" or so and then drop drastically then lift and so on down the magazine.

While I'm not familiar with your conversions, I wonder in my bones whether while this might be helpful in a Bren magazine specially designed to do this, it might have the opposite effect with your complicated mag platform magazines.

Just a thought