Gone&didit said:
What about using the Bulgarian 5 rnd double stack mag (KVAR # M-74N5) as a source for the floor plate and follower? A cheap East German bakelite mag could be "rebuilt" by replacing all the parts around the spring perhaps?
Careful, we're walking on that fine line where you could be considered as MANUFACTURING a high-cap mag, which is banned. I know its BS, but it is the law until Sept.... be careful.
The replacement magazine parts are like the pre-ban configuration replacement receivers that get shipped in from time to time... specifically the AUG replacement A2 receivers. Send the old part back, get the new part and retain pre-ban status.
Break your C-Mag, send back to betaco for repair, (or replacement of defective part), get the new part and retain pre-ban status.
Buy a pre-ban magazine body, assemble w/ post-ban floorplate and follower, IOW *NOT* stripping the parts from your EXISTING black 5.56 mag, you could be considered to be manufacturing a high-cap banned mag.
Just be careful... I don't think the law is very clear on this particular subject, but I know that you can't just make one from post-ban parts. The build-up of the pre-ban mags that high-cap did to make the 45-rounder '74 mags worked with all preban parts. He got an ATF letter saying it was OK. The 72-round 9mm Uzi drums made from Suomi mags and other "cross-model" conversions were not allowed... ATF said no.
Now... if you had a pre-ban 5.56 mag, you could use that follower & floorplate all day long, since you aren't building a *NEW* mag, rather you are swapping the replacement parts for your old mag.
I hope all this makes sense... I am worried that this is going to fall under the "for repair or replacement only" category... just can't say for sure. I think I would err on the side of caution, unless a legal eagle can make a clarification for us.
Or just buy all that now, and wait until Sept. to assemble!
- Jerry