The ProMag Industries FNH-A2 20-Round Magazine combines reliability with advanced engineering for optimal firearm performance. Constructed from durable polymer in the USA, this magazine features precision-wound springs and a lifetime guarantee, ensuring longevity and dependability during use. 20 - Round Capacity 20 Round body plus 10 Round Extension Precise Manufacturing Long Term Reliability Durable Polymer Construction Equip your firearm with the ProMag FNH-A2 Magazine for superior performance and peace of mind.