SpecificationsBrand: PTSConstruction: Dupont Zytel High-Performance Reinforced PolymerMagazine Type: Mid-CapCapacity: 170 RoundsCompatibility: For most M4/M16 AEGsProduct Dimensions: 5.5 x 2.8 x 1 inchesColor: BlackFeaturesUnique magazine mag well guide that reduces snaggingReinforced texture with EP dot pattern for better grip and handlingThe new polymer baseplate has an angled surface and dot matric that prevents slippingOrange magazine level indicator that shows how many rounds are left in the magazine (Indicator is an approximation of remaining capacity)High efficiency and tension spring ensures reliable feeding even in fast rate of fire AEGs and HPA setups