Finally someone who understands. We've been saying this all along. You are only limited to the number of mags you carry with you and how fast you can change them.I understand the cool fator of having a million bullets in a single clip, and i understand the want/need to mod a toy you love (i am a paintballer with modded pb guns) but I personally think the best way to have a higher capacity is to just buy more 10-round mags and practice quick switching them.
i donno if my suggestion will help but i know at some of my local gun store have buckets of crappy old mags they sell for way cheap. i h=got some bersa mags to dink with but to no avail.if i could get my hands on some spring material to mess with i bet i could get a working drumm mag.does anyone have some spring material they could donate to the cause i have the sheet metal i might beable to make the spings ,self just for s proto type and then maybe send it off the a spring maker and have a professional pring made.what i would need is a mag follower in .9mm/49s&w and some sping material atleast 18"long and a few mags to chop up to make some of the pieces but i know i could probably make a drum or banna clip a banna clip for sure.
SW, I can tell you that if you use a MIG welder and small 1/16th wire a good welder should be able to get this done. I work in a wheel factory and I use submerged arc welding on these. You would be surprised at what materials can be welded successfully.on the subject of welding mags together, i did a few steel CETME mags back during the ban (yes it was legal) to make 40 round 308 mags. its not easy, but its doable-given the material is thick enough. the thin sheet steel of HP mags would be very dificult. if you could find steel tubing the correct size, (i have yet to) you could build one as long as you could make a spring for.
In "expediant homemade firearms" by P.A. Luty, the author talks about making a single stack 9mm magzine from 35x16mm ERW steel tubing and making a mag spring from 20-gauge piano wire. This is theoretically possible but extremly difficult to produce a working finished product. Anyone with a modicum of metal skills can make a mandrel and bend and weld sheet steel better.
Promag High Capacity Magazine
PROMAG HI POINT 995 30RD DRUM POLY
Promag High Capacity Magazine PROMAG HI POINT 995 30RD ...
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Item # 166125
Im guessing this guy is still in the workshop.I too am going to try the suomi drum conversion. My buddy sucsessfully converted one for use in his ar-15 in 9mm. So I have a working prototype to copy. and yes you would have to use the 15rnd mag cause its taller..... will let you know if it works....