7.5cm Panzerabwehrkanone 40 (PaK 40)
Transport. Shield folded up and legs together, with some other sort of blast shield at the end...
Backbone of the German anti-tank guns. Other variants used were the KwK 40 and StuK 40. Around 23000 were produced.
After my M3 Anti-tank gun went so well, I tried something else, and it worked :p Now my Afrika Korps have something to take down my Grant tank. 6 Brickarms used and lots more flex tubing. 7 studs wide. Enjoy!