Couple easily foreseen problems with this:
1. People would have to be counted on to put their stuff in the right place. We can't even count on everyone to put mechanical guns in the non-electro BST, and electronic guns in the electro BST.
2. Mixed breeds. For example, I have a DYE Reflex Cocker here. DYE or WGP? The WGP people, in some cases, don't consider a gun to be a Cocker unless it's sold under the WGP name (in spite of the fact that the DYE's were made from WGP bodies). Then you've got the mutts like the PsychoBallistics Lightnings and Superbolts.
3. Modding would be a total nightmare. Someone would have to put in no less than a full 40-hour work week keeping it all clean, and we're not paid to do this.
4. The current system works fairly well. Why tinker with a good thing? As any good Cocker owner knows that when something is working pretty well, you leave it alone.