This replacement or spare magazine is compatible with your Colt M4. It is constructed of DuPont Zytel polymer with injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA. NOTE: This mag will not work with Ciener and G.I style 22 conversion rifles.
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Samson 040603201 Magazine Extension made of 6061-T6 Aluminum with Hardcoat Anodized Black Finish for 9mm Luger S&W M&P Shield, M&P Shield M2.0 7 & 8 Round Mags (Adds 1rd)
$30.00
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