MILSIG/Valken M17 M5 CQMF GMAG First Strike Magazine holds 12 rounds. This is the best magazine to feed First Strike for MILSIG Valken M17 M5 CQMF Compatible to: MILSIG M17 Paintball Gun Valken M17 Paintball Gun MILSIG M5 Paintball Gun Valken CQMF Paintball Gun