▁ 7 . 9 2 × 5 7 mm ▁M aus er ▁am mun ition , ▁but ▁was ▁still ▁almost ▁as ▁effective ▁when ▁eng aging ▁targets ▁at ▁typical ▁combat ▁ranges ▁of ▁. ▁This ▁meant ▁it ▁could ▁be ▁fired ▁effectively ▁from ▁a ▁weapon ▁that ▁we ighed ▁less ▁than ▁a ▁machine ▁gun , ▁yet ▁still ▁had ▁much ▁greater ▁range , ▁velocity , ▁and ▁stopping ▁power ▁than ▁the ▁ 9 × 1 9 mm ▁Par ab ell um ▁which ▁was ▁standard ▁in ▁German ▁subm achine ▁guns . ▁The ▁weight ▁of ▁the ▁ 7 . 9 2 mm ▁Kurz ▁S . m . E . ▁round ▁was ▁, ▁with ▁the ▁bullet ▁taking ▁up ▁ ▁and ▁the ▁cart ridge ▁and ▁prop ell ant ▁the ▁remaining ▁. ▁The ▁ 3 4 % ▁weight ▁reduction ▁compared ▁to ▁full - length ▁ 7 . 9 2 × 5 7 mm ▁M aus er ▁s . S . ▁ball ▁am mun ition ▁meant ▁that ▁a ▁soldier ▁could ▁carry ▁more ▁r ounds ▁of ▁am mun ition , ▁for ▁sust ained ▁suppress ive ▁fire . ▁ ▁The ▁short age ▁of ▁br ass ▁in ▁the ▁later ▁stages ▁of ▁World ▁War ▁II ▁led ▁to ▁the ▁use ▁of ▁steel ▁cases ▁for ▁this ▁new ▁cart ridge . ▁The ▁Kurz ▁cart ridge ▁incorpor ated ▁more ▁t aper ▁than ▁the ▁parent ▁case ▁because ▁steel ▁is ▁less ▁el astic ▁than ▁br ass ▁and ▁more ▁difficult ▁to ▁extract ▁( and ▁because ▁the ▁cart ridge ▁retained ▁the ▁same ▁base ▁diameter ▁and ▁cal iber ▁as ▁the ▁longer , ▁full ▁size ▁round , ▁requiring ▁a