ors al ▁tur ret ▁forward ▁to ▁just ▁behind ▁the ▁co ck pit ▁and ▁were ▁armed ▁with ▁the ▁l ighter ▁ 7 5 mm ▁T 1 3 E 1 ▁can non . ▁The ▁B - 2 5 J ▁variant , ▁removed ▁the ▁ 7 5 mm ▁guns ▁but ▁carried ▁an ▁impress ive ▁total ▁of ▁eigh teen ▁" Ma ▁De uce " ▁AN / M 2 ▁Brow ning ▁. 5 0 - cal ▁machine ▁guns , ▁more ▁than ▁any ▁other ▁contemporary ▁American ▁aircraft : ▁eight ▁in ▁the ▁nose , ▁four ▁in ▁under - cock pit ▁conform al ▁fl ank - mount ▁gun ▁pod ▁packages , ▁two ▁in ▁the ▁d ors al ▁tur ret , ▁one ▁each ▁in ▁the ▁pair ▁of ▁wa ist ▁positions , ▁and ▁a ▁pair ▁in ▁the ▁tail ; ▁with ▁a ▁total ▁of ▁four teen ▁guns ▁either ▁perman ently ▁aim ed ▁forward , ▁or ▁aim able ▁directly ▁forward ▁for ▁the ▁d ors al ▁tur ret ▁for ▁st raf ing ▁runs . ▁Later ▁the ▁B - 2 5 J ▁was ▁armed ▁with ▁eight ▁ 5 ▁in . ▁( 1 3 0 ▁mm ) ▁high ▁velocity ▁aircraft ▁rock ets ▁( H VAR ). ▁▁ ▁The ▁British ▁also ▁made ▁large ▁numbers ▁of ▁tw in - eng ined ▁gun ships ▁carrying ▁heavy ▁guns ▁most ▁not ably ▁the ▁de ▁Hav ill and ▁Mos qu ito . ▁The ▁usual ▁fixed ▁arm ament ▁was ▁four ▁ 2 0   mm ▁His p ano ▁M k . II ▁can non ▁and ▁four ▁. 3 0 3 ▁( 7 . 7  