It would be nice if these built-in CO2 GBBR's could use the standard GBBR mags (with built-in CO2). However if a standard AEG mag was inserted, the "backup" CO2 would be used to propell the BB's. The "backup" CO2 could be an interchangeable gas canister or a hose for extensible gas tube in a buffer tube. This flexible feature would offer the best of both worlds.
Last edited by zollen; July 25th, 2010 at 11:45..
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