MedicalKit_supplies.agr seems to be running when a magazine is inserted in a MG. For instance, you can hear medical kit sound effects when you take the MG in hand. It furthermore causes issues when an attachment is changed in inspection mode, as described in the repro below. In principle the repro should be possible with any mod that provides attachments for MGs, I just chose Integrity - Optics as example, since it's a relatively small mod.

Steps to reproduce:

1. Place US arsenal box

2. Equip M249 SAW (RAS) with mounted ACOG 2x20 (Rail)

3. Go in inspection mode

4. Use Detach: ACOG 2x20 (Rail) action (Doing so will play a medical kit sound effect and terminate the inspection mode)