Master of Arms makes AR-15s and parts for them, some of which are actually 3D printed and then finished off with traditional manufacturing processes. They are using laser sintering to make parts out of titanium. They have an interesting muzzle brake design called the Duckpuppy that looks a little... strange.
The Duckpuppy is sold as a long muzzle brake in two different versions. One is a direct-thread and the other is set up for a quick disconnect (QD) attachment utilized with the MOA Sawbrake.
I was unable to find their MOA Sawbrake but I did find their Cyodemus brake which looks to have external threads for a QD attachment of a muzzle device.
Is The Duckpuppy Legal?
Technically, there may be a legality question for the Duckpuppy. If you recall, a few years ago Sig Sauer attempted to get a monocore “muzzle brake” approved by the ATF. Unfortunately Sig Sauer was denied approval after a legal appeal and the ATF categorized it as a suppressor.
Looking at the Duckpuppy, it shares characteristics of a monocore baffle system for a suppressor. Take a close look at the design below and the QD version above. There is a lip or flange at the back of the muzzle brake. Looking along the body there are ringed sections that look to be the same diameter as the back and front portion. It would not be very difficult to slide a tube over this muzzle brake.
From the photo above, the Duckpuppy looks like it could be 2 inches in diameter. I based this off the hole at the muzzle end of the muzzle brake. If that is for 5.56, then it is probably 0.3″ in diameter.
3D Printing, Is it the Wave of the future?
If you recall, Daniel Defense made a 3D printed suppressor called the Wave. I questioned the use of 3D printing since the Wave is a traditional suppressor design. 3D printing was not cheaper nor faster than conventional manufacturing processes. But looking at the Duck Puppy, I do see the value of 3D printing. In this example, the Duck Puppy would be rather difficult machine. Here is where 3D printing shines. You can create shapes and geometries that are physically impossible for traditional manufacturing. You could make complicated channels for gasses to escape and divert away from the bore of the suppressor. I do wonder what the rough texture does to the gasses. If you think of cars, usually a port and polish is done to improve air flow and increase performance.
At face value the Duckpuppy does not seem like a traditional muzzle brake. Muzzle brakes typically redirect gasses to mitigate recoil and muzzle climb. While we only see the Duckpuppy in a 3/4 view, I think there are ports all around the muzzle brake. If that is the case I do not think this will be a very effective muzzle brake for the purposes of controlling the gun.
Right now the Duckpuppy direct thread is retailing for only $375 while the Breach version is a bit more at $725. $375 is actually not that expensive for a muzzle brake when you consider other muzzle brakes like the KAC Triple Tap typically retails for over $400.