Features:Fits the H&K MP5, MP5K, HK94, SP89, SP5KWorks with ETSCAM-RIFLE speed loaderExtremely reliable feeding - Even with hollow pointsFar lighter than steel magazinesFits standard MP5 mag pouches and couplersExtended 40 round capacityCompatible with all MP5 style 9mm firearms such as: Zenith, MKE, Omega, POF, HK Contract MP5 9mm Variants, MP5 style SW5, BW5, CA94, D54, V94, clones or other custom buildsLifetime WarrantyAdvanced Polymer Benefits:Extreme Impact Resistance-won't crack or break when droppedVery resistant to harsh chemicalsSuperior heat, cold and UV resistance-won't become brittle over time even when exposed to harsh environments or extreme coldTranslucent body-allowing you to see your ammo count and typeCreep resistant-the feed lips and body won't spread when being stored long term even when fully loaded