ULTIMAG G17 - 18 round 9x19mm capacity. Product Advantages:18 round 9x19mm capacityTwo enclosed floor platesConcealable base plate installed; tactical floor plate includedVisual indication of even rounds from 4 to 18No tools needed for disassemblyMulti-textured surface for enhanced gripImpact and crush-resistant reinforced polymerMultiple colors availableAlso available in limited 10-round 9x19mm capacity (ULTIMAG 1710R)Compatibility:Glock: G17, G17L , G19 , G19X , G34 , G45 , G47