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5KU SI Advanced Receiver Extension For WA M4
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Description
Strike Industries type stock tube for WA M4 GBB. By regularly scraping off part of the stock tube surface while leaving the necessary parts, you can expect to reduce friction during expansion and contraction operations in addition to weight reduction.
【Notes】
It will be a product for advanced users. Recommended for those who can handle it themselves even if there is processing involved in installation.