Originally Posted by
gundoc
The rear locking system on the 788 presents some safety considerations if you wished to fit a double stack mag and top loading. Such modification would mean substantial modification of the bottom of the receiver to accept the wider feed lips, and similar substantial metal removal at the top of the receiver to allow room for loading. As it is the thick receiver walls that provide the action strength between the chamber and the rear locking recesses, any removal of metal between those points will affect the strength of the action. I know the 788 mags are a pain but you should stick with them, and possibly consider a replacement stock from Boyds.