The MagLink is a coupler for PMAG 30 and 40 round AR/M4 magazines* which allows the user to attach two magazines together for more efficient speed reloads, and to keep additional ammunition accessible on the weapon at all times. The MagLink features a two-piece bolt on design and durable, lightweight reinforced polymer construction. Made in U.S.A. Features Fits 5.56x45 PMAG 30 and 40 round AR/M4 GEN M2 MOE® and AR/M4 GEN M3™ magazines* Impact resistant polymer construction provides light weight and resists operational abuse Wide-set, two-piece bolt-on design resists flexing Integral grooves interface with PMAG ribbing to eliminate slippage