GHK High Output G.2 Gas Powered Magazine for GHK M4 GBB Airsoft Rifles

"A good alternative magazine that is MUCH MORE affordable to buy for your Western Arms M4 gas blowback.

Pro:
Cheaper.
Takes Green Gas.
Looks good.
Very detailed construction.
Good seal.

Con:
None.

If you are in the market for a spare magazine for your WA M4, why not!

"does this take co2

also will this fit in a G&P gbb rifle