I'll throw in a few ideas in regards to Airbone
If its possible (I don't know if we have the animations for that), maybe we could allow AG to fire the DP28s on the move (consistent with US paratroopers) It would make them stand out more from regular Guards.
How about an AVT40? It looks like an SVT, sounds like an SVT, smells like an SVT but it's a fully automatic rifle! Should be pretty easy to code them (Don't know how they would sound/look though) and it would be another unique aspect to Airborne Guards.
Indeed, the AVT-40 was produced in large quantities (And since 1943 and until 1945, SVT was produced only as AVT) and a huge number of SVT were reworked at the front workshops. But the AVT-40 did not intend to always shoot in automatic mode. Automatic shooting is an emergency measure. So AVT-40 can be implemented as the ability "automatic fire"