gas blow back is when a bullet is fired the gasses propel it along the bore of the rifle. After the bullet leaves, some of the gas is expelled and some of it goes onto a second tube at the top. on the ak-47 it is the weird looking curved tube above the barrel. on an m16 it its the front aiming sight bar that rises up. and then goes into the handgaurd. Tej gases then shoot backpushing the empty cartrige out causing the machanism to slide another from the magazine in its place.
.... That is why they are called GAS blowback guns. and since you even asked, i feel it important to tell you that they do not mean gasoline. they mean Green Gas, propane, or Co2
Blowback is a form of gas operation, albeit in a simplified form. Which one is more accurate would be dependent on the specifications and tolerances of each rifle, rather than the operating mechanism. There are also several different types of blowback operation, with simple blowback being used for low power rounds, handgun cartridges, etc., while most rifles which use blowback operation have some sort of delayed blowback operation.
The HK 416 Gas Blowback airsoft rifle measures 31.7 inches with buttstock collapsed and 34.8 inches extended.
Unless it is electric.
No, it is not recommended to use propane as a substitute for green gas in the KWA LM4 gas blowback airsoft rifle. Using propane may cause damage to the gun and void the warranty. It's best to stick to using the appropriate green gas for optimal performance and longevity of the airsoft gun.
No
No, however the gas lasts shorter.
8.4v 1600 mah and 9.6v 2000 mah
'WE PDW Compact Full Metal Airsoft Gas Blowback GBB Rifle' is one that I would recommend to you. I am considering the fact that most players use their GBB's for CQB settings, which is another reason why I would tell you to consider this. The folding stock will help you stabilize for the mid-range shots, while you can easily fold it out of your way for door-breaching.
Blowback pistols are obviously more expensive than non-blowback pistols. On the other hand non-blowback pistols generally have a higher fps and are alot cheaper. It seems that they can use CO2 with less damage or wear and tear to the gun. They seem harder to clean and it seems as though alot of them have internal magazines which are a bit annoying to load. Blowback pistols are obviously easier to load and easier to clean, however it seems as though alot of guns have atleast one problem. That problem could be with a leaking or a slide that doesn't go back all the way. Blowback pistols ALWAYS seem like they have a leaky mag problem and are gas whores, while non-blowback pistols are extremely gas efficient and there mags never leak.
shortyusa.com and airsoftpost.com
Not sure what HBB airsoft is, do you have the acronym correct. I know that GBB stands for Gas Blowback.