Okay.....I'm not completely FNG here.....but I couldn't specifically locate any discussion of this on the forums so I'm putting it up as a new topic.

I've noticed, much like USGI BAR mags, a considerable difference in both tension and free height among many of the BREn magazine flat springs I've disassembled from various mags I have.....both from mags seemingly in still excellent condition and from those that are clearly "well experienced/well travelled".

I am interested in any "official" specifications extent or known that clearly deliniate "new"/"ideal"/or otherwise "original" parameters for free height, tension/compressive force when new, and then obviously the other end of the spectrum as to when indications present notice to trash them/replace?? (And I will assume since I do not actually know that there was only ever ONE BREn magazine spring produced?? And that all spring "coil"(flats/bends) were of a singular specification?)

I shoot my still-all-original Daimler MK II a LOT and in fullauto mode it delivers a noticeable disparity in cyclic rate of fire with different mags used, an audible difference. I am about at the point of just replacing like a group of 20 mag springs with NOS Canadianicon spares.
-TomH
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.