"These are not recommended for guns with silencers". What total damage can happen? Plastic pellets are not recommended, what damage about that also?
Where are you seeing that? There's a good likelihood that if you push these through a barrel with a suppressor or shroud, they will get caught in baffles. You can certainly shoot them through these guns though, but I would hesitate to do that on a springer or gas ram with a suppressor.
WILL THESE WORK GOOD ON A SUMATRA .25?
can I use these in a bullpup gladius 25 cal
Will these work good on a marauder .25...if so how many pellets should i put per shot and should i put oil or not???
Yes. I would use 1 or 2 at a time. Use Ballistol for the first shot, then clean a few shots.