Agm m4 gbb

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hello ok i got a second hand agm m4 and it came with some new loaders so i installed one it has a aluminum red tip if thats any help, it fiers much better now but the bb are just roling down the barrel and the odd one is acholy coming out at speed, all i can think of is the new end has f'ed the hop up but it looks fire i can do photoes later if needed
thanks