Mag Extension

Backup Tactical Mag Extension, Fits Glock 17/19/22/23, Plus 5 Rounds, Includes Extra Power Spring G1923mext.Product Type: Mag Extension

The FNX Magazine Base Pad Extension adds two and a half (2.5) rounds to the existing standard capacity magazine for the FNX 45 model pistols. Why is it 2.5 rounds, not 2 and not 3? Apexs mag extension leaves enough space for 2 additional rounds to be...