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As Kullwarrior was alluding to, the KSC/KWA is a pain in the ass to get to the hopup rubber. You'll want to completely minimize the number to times you ever break the gun down that far.
And you don't really need to if you use your common sense a bit. Stick with 1-3 drops of lightweight (1.5wt) silicone oil in your propane adaptor (refering to the AI design). If you're using the MB resevoir one...then don't put so much oil into it...or don't put any in and just add 1-3 drops to the top of the tank before you put the adaptor on.
Oil is good for the piston cup, the internal touching/bearing/friction surfaces, and the seals in your mags.
While it will blow most of the oil into the first mag and much less into the other mags...if you rotate your mags eventually you'll end up with oil in them all at some point. You do not need oil in every mag every time.
If you can't sleep without knowing that there's some oil in each mag...then leave your tank/adaptor dry and just put 1 drop on the fill valve of each mag before you fill it.
Don't overdo the oil on the KWA/KSC MP7...it's much more like a GBB pistol than it is a closed bolt WE SCAR. A drop or three now and then is enough.
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