hey all, i'm looking for a good quality barrel for my airsoft machine gun i'm making.
A 6mm airsoft bb is .236" in diameter, and i found aluminum tubing on mcmaster that is .2533" ID.
My only question is, is that too large to get a good accuracy rate from a vortex gun? Because with a brakeline barrel, accuracy is pretty crappy.
so i'm wondering if that's small enough to get good accuracy, or is it too small?
I mean will it be almost too small for the bb to ravel down easily?
Thanks
how small is too small for a barrel?
You can get seamless SS tubing on McMaster in .243", which should be an excellent bore size.
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OuchProgramme
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Since this is an airsoft machine gun, MORE than one of the 50 persecond BB's that you'll be shooting will most likely hit the target.
Regarding the title, my personal smallest barrel is 3mm ID 
Can still pop a hole through 1/2" planks
Can still pop a hole through 1/2" planks
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rcman50166
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I would buy one if you really need good quality. Try a tight bore airsoft barrel. Here's a good site I found with a quick google. http://www.madbullairsoft.com/English/i ... ex&cPath=7 They typically are around 6.03 mm diameter. Pretty damn close. BB's fit so nicely, unpolished bb's will jam in the barrel.
Like MrC said, they're usually a little under 6mm. I normally get from 5.95mm to 5.98mm, not as small has he does, but still just under 6mm.
In my opinion, for a vortex, a tight bore barrel is probably a poor idea, given that the feed is a little... vigorous, so there needs to be some gap for it to work reliably, though Neospud/MrPlow has done it with a Madbull barrel I believe.
A fairly tight barrel is however a smart idea, because it will improve muzzle velocity, reduce gas use slightly, and be a little more accurate.
In an ideal world, a barrel would have moderately wide breech end, maybe 6.4-6.5mm, which is then quickly choked down to about 6.1mm. Because the vortex might damage pellets, it's unwise to go as fine as 6.03, as jamming might occur. Not too often, perhaps once in thousands of pellets, but if you occasionally use low(er) quality pellets, it might.
.243" ID tubing should be decent for all those purposes, as the gap would be around 0.2mm, not too large.
In my opinion, for a vortex, a tight bore barrel is probably a poor idea, given that the feed is a little... vigorous, so there needs to be some gap for it to work reliably, though Neospud/MrPlow has done it with a Madbull barrel I believe.
A fairly tight barrel is however a smart idea, because it will improve muzzle velocity, reduce gas use slightly, and be a little more accurate.
In an ideal world, a barrel would have moderately wide breech end, maybe 6.4-6.5mm, which is then quickly choked down to about 6.1mm. Because the vortex might damage pellets, it's unwise to go as fine as 6.03, as jamming might occur. Not too often, perhaps once in thousands of pellets, but if you occasionally use low(er) quality pellets, it might.
.243" ID tubing should be decent for all those purposes, as the gap would be around 0.2mm, not too large.
Does that thing kinda look like a big cat to you?
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OuchProgramme
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Well you could flare out the recieving end
Wouldn't doing so damage the barrel below where you have flared it out? And wouldn't this harm your accuracy? Because, if you shove a nail punch or something in there and ram it, it will cause creases. Or, if you use a dremel you will have metal shavings to clean, and an abrupt edge for the bb's to travel over. I would just get the barrel with a lower tolarance and call it good. The first one, as Ragnarok said, would probably be a good idea.OuchProgramme wrote:Well you could flare out the recieving end
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TurboSuper
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I used some brake-line tubing for mine. Works perfectly.
"If at first you dont succeed, then skydiving is not for you" - Darwin Awards
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OuchProgramme
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Wow..thats not how you flare out a barrel lol...ammosmoke wrote:Wouldn't doing so damage the barrel below where you have flared it out? And wouldn't this harm your accuracy? Because, if you shove a nail punch or something in there and ram it, it will cause creases. Or, if you use a dremel you will have metal shavings to clean, and an abrupt edge for the bb's to travel over. I would just get the barrel with a lower tolarance and call it good. The first one, as Ragnarok said, would probably be a good idea.OuchProgramme wrote:Well you could flare out the recieving end
No it wouldn't harm you accuracy
Its the RECIEVING end...
flaring a pipe isn't putting a dremel through it