colinjallen Posted August 22, 2021 Posted August 22, 2021 I have been messing around with an old G&G CM16 Carbine (the original version) and am getting around 180FPS. I am very experienced at upgrading, fixing and building AEGs but cannot work out what is wrong with this one. The gearbox is original with the following exceptions: SHS M90 spring Metal ball bearing spring guide SHS cylinder head SHS O ring nozzle Gate PicoSSR3 mosfet Rocket high torque motor There is no delayer on the sector gear. The airseal is pretty much perfect and everything runs as it should. The barrel is the original aluminium piece of crap. The two hop setups that I have tried it with are: 1. ZCI plastic hop unit; Maple Leaf Macaron and Omega nub 2. Original G&G hop unit; G&G Green hop rubber and nub Both give the same FPS. With the nozzle fully forward, there is no light leakage down the barrel when an LED is shoved up the feed tube, so I am certain that the nozzle is engaging correctly with the hop rubber. The paper test on the feed tube shows nothing. Any ideas?
Groot Posted August 22, 2021 Posted August 22, 2021 Start with the obvious. Put a new spring in and rule that out. If it's an old gun, there is a chance the spring has spent a long amount of time compressed.
colinjallen Posted August 22, 2021 Author Posted August 22, 2021 2 minutes ago, Groot said: Start with the obvious. Put a new spring in and rule that out. If it's an old gun, there is a chance the spring has spent a long amount of time compressed. The spring is new. This evening, it has had an M90 and an M100 in it.
SSPKali Posted August 24, 2021 Posted August 24, 2021 23 hours ago, colinjallen said: Problem now resolved:). So what was it? Just in case someone else runs into the same issue!
Supporters Rogerborg Posted August 26, 2021 Supporters Posted August 26, 2021 I also need closure on this anecdote! Sounds like the obvious stuff had already been ruled out.
Supporters Lozart Posted August 26, 2021 Supporters Posted August 26, 2021 8 minutes ago, Rogerborg said: I also need closure on this anecdote! Sound like the obvious stuff had already been ruled out. I'm going to guess that he's keeping schtum because it was something really stupid.
Groot Posted August 26, 2021 Posted August 26, 2021 @colinjallen Come on man, put us out of our misery
ak2m4 Posted August 26, 2021 Posted August 26, 2021 Such a little tease ? Did the new ZCI barrel fix the problem?
colinjallen Posted August 30, 2021 Author Posted August 30, 2021 On 26/08/2021 at 17:59, ak2m4 said: Such a little tease ? Did the new ZCI barrel fix the problem? No, that was for another gun that needs to be brought back to life:). Apologies all; I have been walking and wild camping on Dartmoor since that last post and have not had access online. I have no idea what the issue was; I stripped the gearbox and ZCI hop down again, checked everything, reassembled it and, whizzo! 320FPS! Dartmoor was fun; we found a rather large tag round.
Supporters Rogerborg Posted August 30, 2021 Supporters Posted August 30, 2021 4 hours ago, colinjallen said: No, that was for another gun that needs to be brought back to life:). Don't care. 4 hours ago, colinjallen said: Apologies all; I have been walking and wild camping on Dartmoor since that last post and have not had access online. Don't care. 4 hours ago, colinjallen said: I have no idea what the issue was; I stripped the gearbox and ZCI hop down again, checked everything, reassembled it and, whizzo! 320FPS! Cool story, bro. 4 hours ago, colinjallen said: Dartmoor was fun; we found a rather large tag round. Don't care. Great to hear that it sorted itself, cool story, and so on, and so forth.
colinjallen Posted August 30, 2021 Author Posted August 30, 2021 58 minutes ago, Rogerborg said: Don't care. Don't care. Cool story, bro. Don't care. Great to hear that it sorted itself, cool story, and so on, and so forth.
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