From company press release:
Sintercore LLC released the first 3D printed metal firearms part for pre-order today. Neal Brace, founder of Sintercore and a former active duty U.S. Marine Corps infantryman, designed the device to help firearm operators more effectively control their rifles and pistols under rapid fire.
The device, named AuxetikTM, represents a significant advance in firearm industry manufacturing. The word AuxetikTM is derived from the Greek word “auxetikos,” which means “that which tends to increase.”Mr. Brace’s invention consists of a fully-dense Inconel muzzle brake created using direct metal laser sintering technology.Sintercore’s HYLT (hybrid linear / transverse) brake technology reduces recoil, eliminates muzzle rise, and minimizes concussion.
This technology is based on 3D printed linear gas vents, a Sintercore innovation, which allows an amount of gas to flow forward from one expansion chamber into the next expansion chamber through channels that could not be easily made in traditionally manufactured cast, machined, or EMD’d part.Sintercore products are sold directly from the manufacturer’s website, at http://www.sintercore.com The AuxetikTM muzzle brake retails at $399.98 and is available at a pre-order price of $299.98.
Sintercore now writes on the durability of their muzzle brake:
Our T&E examples have currently survived 8200+ rounds of semi- and fully-automatic firing with no performance degradation. The fully-dense, 100% Inconel superalloy construction lends itself to maximum durability for a lifetime of use. This material is as strong as steel and as corrosion resistant as titanium.
Here is the review of 3DX muzzle brake which claims that the piece is holding very well:
... and more videos: