The M17/M18 Magazine configuration is which?

• A. 17 or 21 round staggered box magazine
• B. 20 round staggered box magazine
• C. 30 round box magazine
• D. 40 round drum

Answer: (A)

The magazine configuration for the M17/M18 is a staggered box design that holds seventeen rounds in the standard, flush version and can be extended to twenty-one rounds with an extended base plate. This double-stack arrangement lets more rounds fit in the same pistol grip by offsetting each successive round, which is what “staggered” describes. The 17-round option is the baseline, and the 21-round extension is a common choice for those who want extra capacity. The other options don’t match how these pistols are typically fed: there isn’t a factory 20-round version, and a 30-round box or a 40-round drum isn’t used with M17/M18 magazines.