I would like to counter this:
I have the modify FTK in my M4 and it's brilliant.
Did you lube the cylinder head o-rings, cylinder, piston head o-rings, and inside the nozzle? You have to lube it with cylinder oil, I don't know what it is but I don't think it's silicone oil. I use the G&P oil set from redwolf.
Ár skal rísa, sá er annars vill
fé eða fjör hafa. Sjaldan liggjandi úlfur
lær um getur né sofandi maður sigur.