Hi-Capa Hop Up Chamber Assembly for Marui/ WE/ KJ Gas Blowback Pistol

Much better fit than the stock Marui unit. less wobble in the frame when fitted which along with the I key improved the accuracy And hops .3g with the hop turned up to half way So can definitely lift heavier bb. I do recommend also getting the maple leaf hop up wheel. It gives more range of adjustment. Only gave it 4 as its very snug fit when getting it in and out of the stock Marui hi capa plastic slide.

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Did not come with wheel adjustment