Washington State Considers 'High Capacity' Magazine Ban

I've got a question. What if magazine makers quit making 10 round mags?
TSgt David L., SPC Randy Zimmerman,
SGT James Murphy, CPT Jack Durish,
PO3 Bob McCord, SSG Gordon Holmes,
COL Mikel J. Burroughs, SGT Robert Pryor,
SPC Gary Welch, SGT Mark Anderson,
CPL Douglas Chrysler, Maj Marty Hogan,
1SG Steven Imerman, MAJ Karl Swenson,
MSgt Robert "Rock" Aldi, CW5 Jack Cardwell,
SFC Bernard Walko, SSG Michael Noll,
SPC Nancy Greene, MAJ Dale E. Wilson, Ph.D.