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Air chamber size for 6mm gun

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Air chamber size for 6mm gun

Unread postAuthor: budabob07 » Sun Nov 14, 2010 5:19 pm

what would be a good chamber size for a 6mm airsoft gun powered by a 1/4" QEV. the barrel is about 60cm long. the chamber will be made of 3/4" pvc, but it will have some fittings. i'm guessing that a 5 inch chamber would be good. would it be to big or small? thanks (sry for all the questions ive been posting recently)
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Unread postAuthor: Gun Freak » Sun Nov 14, 2010 5:34 pm

What pressure? Higher the pressure, smaller the chamber required, remember.
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Unread postAuthor: budabob07 » Sun Nov 14, 2010 5:39 pm

oh ya, sry. pressure should be 100-125 psi (pretty low, but its all my compressor goes up to)
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Unread postAuthor: Gun Freak » Sun Nov 14, 2010 5:54 pm

You'll find out you'll get better performance with smaller chamber and higher pressure, but at that pressure I'd say like a few inches. Maybe like 3 inches then an endcap.
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Unread postAuthor: jackssmirkingrevenge » Sun Nov 14, 2010 5:55 pm

Depends what you're after, if power is the most important factor go ahead and make your chamber as long as the barrel, but if you want air economy and a quieter shot 5 inches of 3/4" pipe should suffice for decent plinking power.
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Unread postAuthor: budabob07 » Sun Nov 14, 2010 6:06 pm

thanks, ill probably go with a 5-6 inch chamber. also, do you know approximately how fast (fps) a .2 gram 6mm airsoft bb will go?
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Unread postAuthor: Gun Freak » Sun Nov 14, 2010 6:08 pm

Do you have GGDT? If you do, you didn't need to ask this in the first place.
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