Samurai

Imagine how much better it could have been.

Don't. Silicone reacts with the rubber, making it soft in an uneven way. Use liquid soap to help putting it together.

Red dot.

Maple leaf has a bigger contact point. That means that it can handle heavier BBs than normal hopup rubbers. Heavier BB means better accuracy. If you use the same BBs there is not much difference between any of the quality hopup rubbers. If the barrel is not bent or scratched and is clean, the hopup rubber is clean, the hopup is fixed so it can't wobble - so basically if the gun is in good shape, then the one thing that really affects accuracy is the BB. If you have a good working gun and the right BB, then buying precision barrels, cnc hopups, H nubs, any GB internal parts will only affect accuracy in such a tiny amount that it won't be noticeable in game.

http://www.toysoldier.com.hk/product_details.php?pid=641 But I have no idea what I could use that pouch for.

Also, check the angle of engagement.

If you don't have experience soldering battery cells you probably shouldn't try it on a good battery. It is not that hard to do, but you shouldn't heat the cells too much, but it takes quite a lot of heat to get the solder on the cell properly. It needs a little practice and a good soldering iron. Buy a 7.4 lipo that fits, if you can.

No problem with that. I don't run either. And if you're a sniper, you really shouldn't.

Should be better. Clean the barrel and the hopup with rubbing alcohol with he cleaning stick. Also use god quality heavy BBs, like madbull 0.40g. A good sniper gun should hit a head size target at 50m. A good unmodified sniper gun should hit it on 40m at least, with every shot.

There is actually quite a lot you can do to make an AEG quiet, but that's a high art of airsoft magic. It needs deep understanding of airsoft guns and lots of experimenting and disassembly.

Yes. The EN166 F means that it has the impact resistance we need. (B is even stronger)

I think in taiwan or hong kong there is a sport where they shoot at coins at about 10 yards with highly accurate rifles. As far as I know those guns don't even have a hopup to get even more accuracy. An upgraded bolt action airsoft sniper gun should hit a head sized target at 50 yards. I would suggest a Marui VSR-10. That is the most accurate stock sniper gun and for yard shooting you can leave it as it is. You will need some good quality BBs for it and that's it. AEGs and GBBRs are less accurate and need more maintenance.

Under about 30cm it makes a bit difference. Above that it doesn't matter.

Chrono?

I'm not sure if green gas is cheaper.

Pet bottles are too thin for that IMHO. Use polycarbonate. (That's what protective glasses/goggles are made of) 2mm thick is enough.

If you unscrew the side, you can remove the batteries and charge them in a normal charger. They are AA or AAA I can't remember.

Mine was some china made cheapo. In that the barrel did't had the "window" aegs have on the barrel. I wrapped some pfte teflon tape on the end so if fit snug in the hopup unit. That alone increased the fps by 50. Cleaning the grease from the hopup rubber increased the accuracy.

Is it a single shot? Then it's well worth fixing it around the hopup and cleaning it. Just fix the seals (I did mine with teflon tape) and the wobbly barrel if it is wobbly. Don't change the spring, the shotguns die in their factory setup quickly enough.

There are two pins on the bottom of the front sight that should keep it in place.

Find a workshop with a lathe and pay the guy two beers or something like that to get a new thread done on the outer barrel.

Or much much more, depending on the barrel length. But the air break is there for a reason. It cushions the piston on the last few mms. The gspec has a very short barrel so as far as I know it won't make much difference in fps because by the time the piston reaches that part where the air break works, the BB is already out of the barrel. And without the BB's resistance only the air break keeps the piston slamming full power into the cylinder head (and that's bad).

What two_zero said. If you put silicone on the BB or the hopup rubber, you can say goodbye to the accuracy. Grease the gun from time to time, and keep it clean and it should be fine.

http://www.airsoftretreat.com/forums/index.php?topic=53939.msg571728

If there is no other really big problem with the gun, then yes. Actually a pretty good clean would do it in most cases, and if not, changing the rubber makes the difference. A tightbore won't add that much to accuracy, except when the factory barrel was really cr*p.