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The 9×21mm pistol cartridge (also known as the 9×21mm IMI or 9 mm IMI) was designed by Israel Military Industries for those markets where military service cartridges, like the 9×19mm Parabellum, are banned by law for civilian use.

Place of originIsrael
Production history
DesignerIsrael Military Industries
Parent case9×19mm Parabellum
Case typeRimless, straight
Bullet diameter9.03 mm (0.356 in)
Neck diameter9.63 mm (0.379 in)
Base diameter9.93 mm (0.391 in)
Rim diameter9.96 mm (0.392 in)
Rim thickness1.27 mm (0.050 in)
Case length21.15 mm (0.833 in)
Overall length29.75 mm (1.171 in)
Case capacity1.01 cm3(15.6 gr H2O)
Rifling twist254 mm (1 in 10 in)
Primer typeSmall pistol
Maximum pressure235.00 MPa (34,084 psi)
Ballistic performance
Bullet mass/typeVelocityEnergy
7.45 g (115 gr) FMJ390 m/s (1,300 ft/s)570 J (420 ft⋅lbf)
8.00 g (123 gr) FMJ360 m/s (1,200 ft/s)518 J (382 ft⋅lbf)
Source(s): C.I.P.[1]


Based on the 9×19mm Parabellum cartridge, the case was lengthened from 19.05 to 21.15 mm (0.750 to 0.833 in). The bullet sits slightly deeper in the case, which results in almost the same overall length as the 9×19mm Parabellum cartridge (29.69 to 29.75 mm (1.169 to 1.171 in)).


Citation Linkwww.cip-bp.org"C.I.P. decisions, texts and tables - free current C.I.P. CD-ROM version download (ZIP and RAR format)". Archived from the original on June 6, 2009. Retrieved 2008-10-17.
Sep 24, 2019, 7:13 PM
Citation Linkwww.webcitation.org"C.I.P. decisions, texts and tables - free current C.I.P. CD-ROM version download (ZIP and RAR format)"
Sep 24, 2019, 7:13 PM
Citation Linkwww.cip-bp.orgthe original
Sep 24, 2019, 7:13 PM
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Sep 24, 2019, 7:13 PM