Shop › APEX FNX 45 MAG EXTENSION +2 APEX FNX 45 MAG EXTENSION +2 $45.00 Apex Tactical Specialties FNX 45 Magazine Extension, 45ACP, +2 Rounds, Aluminum, .050" L-Key Allen Wrench Included, Black 119-102 Quantity: Add To Cart Added! Apex Tactical Specialties FNX 45 Magazine Extension, 45ACP, +2 Rounds, Aluminum, .050" L-Key Allen Wrench Included, Black 119-102