The BF-109 carried a Rifle.That is something I never heard off .The translation is +-:The K98(a) is fixed in the straps(b) on the inside of the rightside of the airframe.The rifle is put in or taken out through the manhole on the leftside of  frame part 5...
taken from fb/Daniel Muratore

Bf-190 with K-98 rifle


 Oblt. Heinrich SANNEMANN Staffelkapitän 6./JG 3 in cockpit of his Messerschmitt Bf 109F-2 yellow "1" - Mariupol area (Ukraine) 12 July 1941.
 The armored windscreen was damaged by return fire of Soviet DB-3 bomber, which was shot down by Sannemann.
 Photo: nationaalarchief.nl
taken from fb/Jaroslaw Gwardys

Direct hit

The Me 323 unloading a Renault UE (Light tracked armored carrier and prime mover) in Tunisia.
By September 1942, Me 323s were being delivered for use in the Tunisian campaign, and entered service in the Mediterranean theater in November 1942. The high rate of loss among Axis shipping had made necessary a huge airlift of equipment across the Mediterranean to keep Rommel's Afrika Korps supplied.