I have no idea why. But I do have experience with some of the decision factors in choosing materials. My guess is is its one if two reasons:
1) because weve been doing it and we dont see a reason to change.
OR
2) some other factor unrelated to the material itself
Examples could be:
*the gun company owns another company specializing in the regular sort of nylon
*the regular nylon is LOCATED somewhere that makes it more convenient/cheaper
*supply chain issues make the glass-filled version somehow less reliable from a procurement perspective
*some material property other than strength that makes one vs the other better, more convenient, more tolerant of some condition, etc. (ie storage, temp during manufavture, etc.)
Etc.
1) because weve been doing it and we dont see a reason to change.
OR
2) some other factor unrelated to the material itself
Examples could be:
*the gun company owns another company specializing in the regular sort of nylon
*the regular nylon is LOCATED somewhere that makes it more convenient/cheaper
*supply chain issues make the glass-filled version somehow less reliable from a procurement perspective
*some material property other than strength that makes one vs the other better, more convenient, more tolerant of some condition, etc. (ie storage, temp during manufavture, etc.)
Etc.
