Magpul

-Fits 5.56x45 PMAG 30 & 40 round AR/M4 GEN M2 MOE® and AR/M4 GEN M3™ magazines*-Impact resistant polymer construction provides light weight & resists operational abuse-Wide-set, two-piece bolt-on design resists 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 AR15/M4 specific Magpul magazine such as the EMAG®, PMAG 30G, or PMAG 30 AUS. Will also not fit other larger caliber magazines such as 7.62x39 & 7.62x51 PMAGS or any metal magazine.