he KM4 AEG hop-up assembly fits all KM4 Series rifles, including the new SR Series. It comes with everything pictured. Please note that this does not come with the hop-up numb, part E-13, or the bucking, part E-14.
KWA KM4 Complete Hop Up Assembly (2,5,15,16,15,162,171,26,243x2) 199-1002-0005S
$29.99
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KWA KM4 Complete Hop Up Assembly (2,5,15,16,15,162,171,26,243x2) 199-1002-0005S
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