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Facebook: CRW airsoft store
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Tel: +852 28068892
Special Note for Inokatsu M4 Owners.
For those of you wishing to use the ProWin M4 gas magazines in an Inokatsu M4, we recommend you to purchase this product. The reason is because the Inokatsu M4's factory hammer spring is sometimes not stiff enough to strike open the valve on this ProWin gas magazine. The stiffer hammer spring solves that problem.