Made in the usa, the maglink is a coupler for 5.56x45 pmag 30 and 40 round ar/m4 gen m2 moe and ar/m4 gen m3 magazines which allows the user to attach two magazines together for more efficient reloads.The maglink features a durable, lightweight polymer construction with a wide two-piece bolt on design that resist flexing.Integral grooves interface with pmag ribbing to eliminate slippage.Made in usa.*note- this maglink is not compatible with first generation pmags (with black follower, circa 2007-2009), 10 or 20 round pmags, custom branded pmags or any other non ar-15/m4 specific magpul magazine such as the emag, pmag 30g or pmag 30 aus.Will not fit other larger caliber magazines such as 7.62x39 and 7.62x51 pmags or any metal magazine.Caliber: 5.56x45mm NATOFinish: BlackModel: MagLinkMaterial: PolymerModel Fit: AR-15, M4 ,M16