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Post by iceberg on Jul 24, 2011 22:39:35 GMT -5
Its gonna need a TON of custom work done to get it looking even close to that. leave it stock and get better at working/fabricating parts.
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Post by Knief on Jul 26, 2011 9:08:47 GMT -5
Iceberg is right, 650mm is too long even for a type 0 cylinder. You'll get piston suck like crazy and it'll shoot like shit. Stick with a Prometheus or SystemA 6.03 or 6.04 tightbore in whatever your stock length is.
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Post by Bulletproof on Jul 26, 2011 10:04:20 GMT -5
Alright I won't argue even though the PSG1 shoots with a 650mm barrel(must have specialized gearbox parts?). At this point I just want a gun that shoots great and I'll handle the externals later. If I have any other questions I'll post them.
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Post by Knief on Jul 26, 2011 10:30:46 GMT -5
Yeah, the PSG-1 does have an elongated cylinder to handle the extra barrel. The way it works is, you need to have enough air in your cylinder to fill your barrel plus account for all of the air leakage (no matter what you do to a gun, you will always get some leakage). A V2/V3 gearbox can only old a certain size cylinder, and that cylinder can only hold so much air. When you install a barrel that's too long for your cylinder, you run out of air flow with your bb part way down the barrel. The bb starts dragging against the sides of the barrel and you lose all your velocity and accuracy. Some gearboxes are designed with a longer cylinder and barrel combination in mind, such as the PSG-1 gearbox (and I believe there is an extended V2 in a number of SR-25 models, though I don't know if those have extended cylinders to match or if they're extended elsewhere). Without a gun that has one of those gearboxes, you're SOL.
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Post by Bulletproof on Jul 26, 2011 11:26:23 GMT -5
Great stuff to know, thanks for the in-depth explanation. I still haven't bought the bucking, nub, and tightbore because I don't know what to get. Bucking: I will be needing a hard type bucking because my will be shooting at or around 400(but it is shooting around 430 right now). I have ruled out the Prometheus bucking because people said it was too thick, and caused a myriad of problems I don't want to deal with. Now I'm looking at a few different buckings: the Firefly bucking, the PDI W-hold bucking, and the Systema bucking. My biggest problem is I don't know anything about bucking and nub combos, and how to get the most effective hop using different nubs. As for the tightbore, it's pretty much between Prommy and Systema, they are the only brands I've heard of that make a 550 length tightbore. There will only be a slight difference between a 6.03 and a 6.04 as far as I know, but I don't know the quality of the Systema barrels, but I would think that they would be on par with their other quality parts.
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Post by Knief on Jul 26, 2011 11:42:19 GMT -5
SystemA barrels are excellent, as are Prometheus. The Promy might perform just a smidge better, but not by a lot. If you like that extra assurance, just buy the Prometheus. If you'd rather save a couple bucks, get the SysetmA. As for buckings, either SystemA or Guarder are the way to go. The Guarder bucking comes with a num, the SystemA doesn't. So if you get the SystemA, you'll need a nub to go with it. Honestly, don't both with any of the H nubs or rounded nubs or any of that. Yeah, if you install them perfectly (which is a pain in the ass) you get a bit better performance for a while. Then the bucking and nub start to wear unevenly and you start hooking shots to one direction or another, and you've got to replace them and install them again (still a pain in the ass). Just get a basic nub and call it a day.
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Post by Bulletproof on Jul 26, 2011 12:06:15 GMT -5
I think I will go with the Systema, to save some money to get other stuff. As far as the nub, if I can't find my stock nub(in my other thread ;D) I may buy the Guarder bucking just to not have to buy a nub separately. Before now I was considering the SHS concave nub, but now that just seems like a waste of money. I will do a bit more research regarding the PDI and firefly buckings(firefly is so hard to find in stock I shouldn't bother). I would like to buy this from a US supplier to save on shipping and time. I don't use Evike because last time I tried their Paypal was down. Last time I used Airsoft Atlanta, but they don't have the Systema Barrel in stock. Are there any other US-based airsoft companies that carry a decent amount of upgrade parts?
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Post by blarg92 on Jul 26, 2011 19:19:43 GMT -5
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Post by Bulletproof on Jul 26, 2011 19:31:48 GMT -5
I've already been inside and yeah, it's a pain in the ass, not as much to get in as it is to put everything back together. But gearbox work is what really raises my blood pressure. It's just so easy to mess up, then you have to put your gun all back together... EDIT: Airsoft GI does have Prommy barrels, but they have absolutely NO 550 length barrels.
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Post by Bulletproof on Aug 13, 2012 21:42:49 GMT -5
Bump from the dead for a new question. If I get a 509mm to save money (buying from somebody here on the forums) would that extra inch of barrel make any difference (I mean by it hitting the external barrel, I know it won't matter in accuracy)? Also, what's the deal between 6.03 and 6.01? I've read a couple different things about it, and they always seem to say "if you buy a better brand barrel, it doesn't matter". If I buy two barrels of the exact same material, exact same length, exact same brand, and the only difference between them is one is 6.01 and the other is 6.01, what will be the difference in performance between them?
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bobbunny
New Member
No long fishing.
Posts: 779
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Post by bobbunny on Aug 13, 2012 22:33:12 GMT -5
Usually 6.01 is better (Hur Dur), but it can also cause problems with jamming if you use crappy BBs or don't clean it. 6.03 is just as good.
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Post by Bulletproof on Oct 31, 2013 16:37:21 GMT -5
Epic thread revival! Wow, this was a long time ago... Anyway, I have stumbled across a question: bore-up vs. normal. I know that bore-up increases the volume of air compressed in the cylinder and requires new cylinder, cylinder head, etc., but what are it's effects and is it necessary? My barrel is 534mm and depending on the effects of a bore up I may hop up to a 550mm or 590mm for convenience of a tightbore (I don't think Prommy makes the SG550 tightbore anymore).
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