▁occupied ▁Europe ▁and ▁behind ▁enemy ▁lines . ▁British ▁contract ▁Ball ester – M ol inas ▁are ▁identified ▁by ▁serial ▁numbers ▁r anging ▁from ▁ 1 2 . 0 0 0 ▁to ▁ 2 1 . 0 0 0 , ▁marked ▁with ▁a ▁" B " ▁prefix ▁( i . e . ▁B 1 6 3 4 3 ). ▁ ▁Vari ants ▁A ▁version ▁of ▁the ▁Ball ester – M ol ina ▁chamber ed ▁for ▁. 2 2 ▁Long ▁R if le ▁was ▁manufact ured ▁for ▁training ▁purposes . ▁This ▁version ▁was ▁identical ▁extern ally ▁to ▁the ▁standard ▁Ball ester – M ol ina , ▁except ▁for ▁slide ▁mark ings ▁indicating ▁the ▁cal iber . ▁However , ▁the ▁. 2 2 ▁cal iber ▁version ▁is ▁blow back ▁operated ▁to ▁accommod ate ▁the ▁less - power ful ▁rim fire ▁cart ridge . ▁This ▁version ▁was ▁produced ▁in ▁much ▁smaller ▁numbers ▁and ▁is ▁much ▁r ar er ▁today . ▁The ▁Ball ester – M ol ina ▁p istol ▁also ▁came ▁with ▁an ▁extended ▁bar rel ▁and ▁a ▁wooden ▁but t stock . ▁ ▁Users ▁ ▁E A ▁F AA ▁G NA ▁P FA ▁P NA ▁ ▁See ▁also ▁O bre g ón ▁p istol ▁ ▁References ▁ ▁Notes ▁ ▁Bibli ography ▁▁▁ ▁Hog g , ▁Ian ; ▁G ander , ▁Terry ▁Jane ' s ▁G uns : ▁Rec ogn ition ▁Guide ▁London ▁and ▁New ▁York ▁City : ▁Har per Coll ins ▁Publish ers . ▁Four th ▁Edition , ▁ 2 0 0 5 . ▁. ▁Ar