Airsoft Supplies For Sale

Blow Back

What is the difference between blow back and non-blow back air guns?

I am looking to buy an airsoft gun and I need to know the difference.

There are two types of gas guns, blowwback (GBB) and non blowback (NBB).

With GBB guns a small amount of the gas released by pulling the trigger is used to shoot the slide backwards, imitating the recoiling slide of a real gun. The moving slide recocks the gun, giving it a semi or full auto action.

With NBB's all of the gas released is used to power the BB. As there is no moving slide the gun doesn't automatically recock itself, so most NBB's have double action triggers (pulling the trigger first cocks the hammer and then releases it.)

Because all of the gas in an NBB gun is used to power the BB, they're more economical with gas and more powerful than GBB guns. Also, because of the lack of moving parts NBB's are much quieter than GBB's and thus more useful for sniping or night games.

Despite the fact the NBB's are cheaper to run and quieter than GBB's, many people prefer to use GBB's as they're more realistic and are semi/full auto capable. That and they're just much more fun!

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