Big Gun of Brick, Lego Gun, monsterbrick
By A Mystery Man Writer
BrickNerd - All things LEGO and the LEGO fan community
LEGO Life-Size weapons
LEGO Guns Brick Replicas
MOCs Designed by NickBrick Rebrickable - Build with LEGO
Big Kid Brix – Tagged weapons – Bricks and Minifigs Huntsville AL
BrickArms Reloaded Marshall
Lego guns
BrickArms Reloaded LEGO Minifigure Weapons
BrickArms Overmolded StG44
LEGO Guns Brick Replicas
Large brick built rock monster moc (instructions linked in the comments) : r/DigitalLego