what are the possible causes of low fps and a resource for repair
Need more details. Did you upgrade it? Has it always been like that
Did you spray WD40 down the barrel at any point?...
Some say-That it's impossible for him to wear socks, and he can open a beer bottle with his testes.
no wd40 ever upgraded spring, bushing , new motor
Check out the bucking, if it has a very noticeable dip in it replace it. It could also be an air leak between the hop unit itself and the gearbox. Or the compression could of vanish due to gunk or an old air nozzle.
Some say-That it's impossible for him to wear socks, and he can open a beer bottle with his testes.
should the air nozzle have any lubricate on it at all
take your gearbox apart.
Your mistletoe is no match for my T.O.W. missile!
Well whenever you get a new spring it usually takes about 1000 rounds before its fully worn in. everyone in my squad has gotten a new spring at some point and it shoots kinda crappy for a bit but after awhile it gets to its full potential. same rule applies to hop up bucking and a new tight bore barrel, except those require more rounds through them
We shall meet in glorious battle