Ok.. so i have a gbbr m4 from ka. For some time ive been having issues with the blowback action. Everytime i load the mag with gas and select a firng mode, it seems to throw little gas and not blowback the bolt and i have to rack it back everytime i pull the trigger. Ive bought a new bolt and gas internals but havent fixed the issue. Before i take it to kal.. does anyone have any info or suggestions that can help. By the way.. ive lubbed the hell out of it and completely took it apart. Any help will be appreciated and plz txt at 9567427426.
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