Rubber sleeve on the M4 series airsoft gun bin. It is designed for a more ergonomic and harder grip than a shaft / magazine. P>
was founded in 2009 in GuangDong province of China, as the first, most reliable retailer and wholesaler specializing in airsoft and wargame equipment. FMA offers more than 1000 airsoft products such as helmets, masks, battery boxes, flash lights, goggles, silencers etc. All their products are popular in Europe and USA.
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