Our Harkonnen Cannon stands at 7.5ft long! It's a monster! (Only a monster of a weapon is fit for a monster!)
The cannon replica is a sturdy mix of plastic tubing (barrel), wood (arm rest and grips), and resin filled book board (the main body). The arm rest at the back and the hand grip are very comfortable. Because of the length, the cannon can be a little awkward to carry. Nonetheless, the item weights about 15-20lb which isn't as heavy as the item looks. Although, we do advise to make sure you have places to rest AND don't forget to look both ways before crossing lines of cosplayers... we wouldn't want you to clothline anyone.
The tripod underneath is a functional tripod that opens/ flips down so you can setup the cannon along the ground.
We based the size off of Walter from the OVA (see the reference picture below).
We NOW offer a 6.5ft version for those cons that have size restrictions like Otakon.
Detail View of the Details
Added views of the decals on both sides. One side has the Hellsing company name while the other side has the weapons details as well as the Hellsing badge.