Skara

Blue cylinder is the stock one, the brass comes from my old ICS M4..

Brass one is say 48mm to front of cylinder

Blue is about 45mm to front of cylinder

either would do - not much in it tbh

When you lost say 25fps/0.2j (depending on bb used)

that could have been from refitting bucking/barrel

or in a new hop/barrel setup

or

the bucking refitted to longer barrel that may not have sealed so perfectly

Coz a longer barrel would lean to more creep not less

So I'm a little surprised it drop a bit, should have crept up slightly

which I wonder if the new barrel/hop was fitted 101% perfectly

or a new hop/rubber/nub installed made the difference over original

in other words - if fitted correctly or a new bucking/refitting made a less effective seal or either a bit of dirt/grease ensured a bit more hop required to lift bb and that was where the drop took place

coz all things being equal you should have gained say 0.1j perhaps

The blue G&G cylinder is slung in most G&G's up to say 333mm barrel

and I'd lay money the spring is a m110 (360fps) or just over to make a firehawk type barrel hit 320fps with a 140mm barrel

by all means test/try the other cylinder but something changed when barrel/hop got refitted imho

also if open it up - check compression coz G&G's on some piston heads produce a below par seal, so get good compression with what cylinder seems to seal best on piston, with a decent o-ring etc....

But reckon the refitting of barrel & bucking especially did not go so perfectly and thus you lost power is a possible thing to investigate

or hop unit is sloppy and shifts forward at times losing seal

so ensure spring on hop unit to push it back to seal, if the mag tries to shift it away from box when inserted

something ain't right & whatever it is up with hop/bucking

THAT is what might have caused the drop

Thanks for the reply.

I indeed expected an increase in muzzle energy with the longer barrel.

I have already changed the piston head o-ring as the stock one was crap (all mangled and no matter what I did, it would not seal), the hop rubber was a prometheus purple that got replaced with a prometheus blue (flat) and then back to purple because the blue went in another gun.

Now I have a ML MR-Hop AEG rubber with its Omega tensioner, which is noticeably softer than the two prommy rubbers I had previously. Now, when I had the stock 130mm inner, both prommies gave perfect air seal and consistent readings of 0.98/0.99 Joules, compared to the stock G&G blue rubber that had readings all over the place (same thing happened with the G&G green, chrono looked like it was on LSD).

I am pretty sure I have installed the hop/barrel correctly and the spring that pushes the unit against the gearbox is fairly strong (it's the kind that slides over the barrel). Mags are very consistent due to their AK style locking mechanism and overall tight magwell, if they push the hop away from the box they do it in a very consistent way as well, because the readings are pretty much +- 0.6 m/s

I'll chrono with the new rubber tomorrow and see if it has changed anything, then I'll open it up and mess around with the air seal again.

Worst case it'll be a new piston head + o-ring and a softer spring to compensate for the energy output increase.

When it is 30 degrees C at night you get used to it, relishing the coolness from the daytime temperature.

When I used to airsoft in Spain, I'd usually wear nothing more than a pair of trousers, belt kit and a lightweight t-shirt or one of those nice 5.11 lightweight short sleeved shirts.

But yeah, as has also been said... Water is key. Drink absolutely loads of it.

Be a cool customer under the line of fire of bb's......oh and water!

eh, they do wear out but they are a wear part by design.

must admit i need to stock up on ml stuff, omega nubs in particular seem to be running dry.

Yup, only needed one nub but added a few just in case I need to mod them.

Will test the AEG rubber on my ARP, comparing it against a bog standard prommy purple and see how it fares.

Bugs me that I basically spent €60 on a bunch of silicone tubes and tiny bits of plastic

Its an expensive hobby that's for sure.

Like when i realise my last ammo shipment cost more than some of my guns.....

Same, until this morning at 9 the tracking showed "in transit" somewhere in Bologna (makes no sense as it's even further away from me than Arezzo 😕)

Also can't figure why a random unknown italian store had these pistols in stock when half europe is still preordering them from Asia

postage logistics is truly a mystery. you could post something down the street and it'd take longer to turn up than if you'd posted it across half the planet.

Yep, bought 2 batteries from the same shop I bought the AAP from a while ago (bought them for a mate) on eBay, it took a month for them to arrive. And they forgot one -.- (they refunded it quickly tho, literally 2 minutes after contacting them)

judging by the last time you spoke about the italian postal system it'll take about 14 hours to get 199.5km and 2 weeks to make it the rest of the way.

tbf i get a similar issue with one particular shop in ireland, for some reason stuff takes exactly a month to arrive and turns up smelling of fish.

i don't want to say the irish postal system involves chucking the package on the first lorry that looks like it's going vaguely the right direction, but i'm gonna insinuate the hell out of it.

It's a private courier who's won a contract with the postal service (they're just as bad, no wonder they won lmao).

Their website is also busted, so can't really track anything

I just hope it gets here before Friday.

Hold on, smells of......fish? the fuck?

i know, but no word of a lie it smelt like it had been chucked in the back of a fish lorry.