Stuff breaks, fortunately all of the bodyguard bulletproof Backpacks accept standard items that can be found on Amazon…
Upgrading your Gray Switchblade Backpack.
There are two main differences between the old and the new style. The waist buckle and compression straps.
Compression Straps for old style Switchblade and First Responder Backpacks
Replacement Ladder Buckles for Shoulder Straps (First Responder and Switchblade)
Replacement Buckles for ELITE Backpacks (1 inch)