I've said it before and I'll say it again. We should be asking what all those graphs and histograms representing German production might have looked like had there been no bombing.
The point is valid and IIRC USSBS shows that plans were not nearly met during the heaviest bombing. This probably had other reasons as well (lack of material or cease of alloys from import, lack of workers, optimistic planning etc.).
The bottomline however is that German did not have a lack of weapons, they in fact had a large surplus in the midst of heaviest bombing towards end of the war. There bottlenecks were manpower to man it (this was shared by many others, esp. UK and surprisingly - USSR), and fuel to drive it.
If production would be less hard hit the Germans would likely produce more - but again in all likelyhood, it would just end up storage.