Cylinder/barrel ratio & Spring help (mostly spring)

[Seany.exe]

Ok so this is more for confirmation really as i've been looking aboot for infor to get my bastard gun up to scratch.

it's a generic v2 G&G gearbox, only upgrade in it is a random SHS piston head & cylinder head I had laying around no idea what spring in it as i have 3 laying about that all look identical.

97mm Crazy jet barrel w/ hotshot bucking

Currently shooting at .7J with .25G BBs in it.

So anyway, looking around I think I need a type 3 cylinder with this short of a barrel, the one with a slot halfway down so i'm gonna grab one of those when i get paid along with a decent spring guide. The main thing i'm confused with is which spring would be best. Should a 110 spring do the job or does it need to be more powerful with pistol length barrels? Looking for the sweet spot of around 340fps/1.1J (however you measure your output)

 

[Prisce]

Short barrels need higher springs. My 300mm used an Modify M100 spring and came out at 370fps, my Random M90 is at 343 currently.

I haven’t looked it up but my brain is telling me that cylinder isn’t correct. I think with that size barrel you need a type 1/2( half way down hole).

Edit:https://socomtactical.net/airsoftblog/airsoft-how-to-guides/what-cylinder-to-use-with-different-length-airsoft-barrels/

Should help you.

 

[Davegolf]

I think your right, type 3 cylinder AOE corrected and M110 is as good a starting point as any, you could hypothesise away but that should get in the ball park.