LEGAL NOTICE:
Feed towers: Beta Company manufactures other feed towers like: HK33/52 & G36, M249 & etc intended for use by the military, police, dealers and export to friendly countries. They may not be installed in a pre-ban Beta C-Mag as it will be a violation of the law,
"A Beta C large capacity M-16 magazine manufactured prior to September 13, 1994, and combined with a feed/locking clip manufactured after September 13, 1994, that is intended to convert the magazine from M-16 configuration to be compatible with Steyr AUG or HK-93 rifles would be considered a restricted large capacity ammunition feeding device. Such magazine is subject to the prohibitions and restrictions contained in Title 18, U. S. C., section 922 (v)"
This only applies if you want to change it from the original configuration, any broken part of the magazine can be replaced as long as you don't end up manufacturing another magazine or changing configuration. In other words you can not take an HK tower made after the ban and install it in a pre-ban M16 mag, also having enough spare parts to create another totally new magazine from 100% spare parts is against the law.
[url]http://www.dealernfa.com/legal_info.htm[/url]