[chico20854]

Uniforms and signal gear would be about all I would change.

Vehicles and heavy weapons - too much to replace during an active war, too much retraining required.

Small arms - Muscle memory among your infantrymen is invaluable. Maybe train new recruits on G-3, G-36 or G-11, but what do they do when they get assigned to a squad that has all AK's? (Either way, replacement training will be complicated - the Germans would have to run a regional-based training system like WWII, where units were fed from dedicated unit replacement depots back home that drew from a certain region).

Uniforms - no big deal.

Communications and electronic gear - whenever possible, I'd replace. The Russians might have built "back doors" in, they have better knowledge of how they work and how to spoof them, and spare parts are going to be hard to find. Assigning Bundeswehr communications specialists to NVA formations would be a good way to ensure loyalty or at least watch over what was going on in those units - certainly not iron-clad, but useful, and can be done under the cover of providing trained signallers to service/operate NATO-standard communications equipment.

Munitions - send 'em back to the Russians, one round at a time.

As the war goes on, you'd probably see recovery teams following the front lines to salvage parts from or return to service damaged Pact vehicles, collect & sort small arms, ammunition and other supplies needed to keep the NVA (and other allied forces equipped with Pact gear, like the Egyptian army, the Polish Free Legions and some IPA units) in operation. As former NVA units are brought off the line for rest & refit they might be re-equipped with NATO standard gear as it becomes available. They might compress former NVA units (i.e. reform a NVA battalion, at half strength, into 2 companies of NVA vets with Pact gear and 2 companies of new replacements with NATO gear), which, while disruptive, maintains some unit cohesion and avoids having a mix of systems within a smaller unit.