Rail System for M4

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R.I.S. ( Rail Interface System ) for Tokyo Marui, Classic Army, KWA, JG, Echo1, G&G, DBOY, G&P and compatible M4 / M15A4 Series A.E.G.*Due to various different models of Echo1, G&G and certain M4 from certain brands don't use standard real steel delta ring and hand guard cap, you may require a real steel spec delta ring and handguard cap to fit this RIS on your M4 Carbine.Manufacture: Matrix / JGFeatures:-Easy installation, fits between delta ring and handguard cap of your M4.-Weight : 438.2g-Compatible with other brands : Yes, slight modification might be required for certain brands.-For M4 series A.E.G.-Machine precision construction.-1:1 scale to real steel.-Heat sink plate included.Manufacture: Classic Army / Echo1 / Matrix / CYMAThis is the high quality Airsoft RIS with laser engraving and aluminum heat sink on the internal. Retail value over $100. Show more