Kwa mp7 o ring
 

hello im new to gbb and love this gun problem is the guy I bought it from didnt know anything about the gun neither do I. I have been told to add silicon oil to nozzle and o ring in gun but I have no clue where they are. help please

That's usually a mistake with the KWA MP7. Running oil in the mags is normally enough to keep it running.

The hop up rubber is prone to swelling up from oil. Anything you put on the nozzle and O-ring will transfer directly.

You can field strip and put silicone grease on the bolt's working parts to keep it lubed but just pouring oil in isn't ideal.