Mag has come out with extensions for their ML300 and ML25/ML50/ML150 lights as well as one apparently for 2nd Gen LED D cell lights - these provide storage space for survival items and the like.
https://www.maglite.com/shop/parts-and-accessories.html
These might be nice if you want to replicate the length of some of the longer incan Mags using one of the newer LED Mags.
https://www.maglite.com/shop/parts-and-accessories.html
These might be nice if you want to replicate the length of some of the longer incan Mags using one of the newer LED Mags.