The MagLink is a coupler for 5.56×45 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. *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 7.62×39 and 7.62×51 PMAGS or any metal magazine.