Woodchuck here. I just finished a run of these long rifles. They are used by sand troopers, and are affectionally known as the 'BFG". Big F------- Gun. T-21 is the designation. My version is made from wood and PVC. It is 53 inches long, weighs in at 4 1/2 pounds.
Amazing work, this blaster and your other stuff as well, woodchuck!
Interestingly, my family is full of carpenters, joiners and woodworkers (come to think of it, my other grandfather ran a sawmill), so even though I'm personally not that much into woodworking, I have a soft spot for it!