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  1. HK416 and HK417 HQ
    Hi everyone, new HK fan boy here. Out of curiosity, I wonder if you can put an MR308 A3 20'' barrel on G28(Z). The reason I'm wondering this is that G28 has steel upper for better durability and accuracy, but only 16.5'' barrel, wouldn't this "20inch barrle+steel upper" combination make...
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