LEGO Instructions - German WWII Pak-40 Anti-tank gun - YouTube
WW1 German Field Artillery - Build Kit – JD Brick
Custom WWII 10,5-cm-leichte Feldhaubitze 18 out of LEGO® bricks - Brickfactory Berlin
WW1 Field Gun – BrickTactical
Lego TUTORIAL: Mini Howitzer Artillery Cannon - YouTube
Brickmania M3 37mm anti-tank gun LEGO WW2 | eBay
LEGO MOC Heavy Artillery Gun (HAG) by ThrawnsRevenge | Rebrickable - Build with LEGO
Building a Lego WW1 Howitzer - The Battle of Verdun - YouTube
Amazon.com: Octopbrik Flak Anti-Tank Gun, Military Brick Sets, Compatible with Major Brand, Army Series Building Block with 2 Soldiers Figures (258 Pieces) : Toys & Games
NEW RELEASE: Type 1 47mm Anti-Tank Gun | Brickmania Blog