Magneisum archery risers are made in molds and bottom line, they are not as strong. or precise as a forged/machined alum riser. They get tiny air pockets among other things which obviously reduces strength. Hoyt is about the only big company using cast magnesium anymore, and I've seen a couple goofy reflex Growlers and new "Hawk" series bows-you can get bad "runs" of cast magnesium risers- even from the best manufacturers and thats the way it's always been. Hoyt simply cannot make a "tec" riser out of machined aluminum in the price range that they need. Costs too much-hence the rleiance on cast magnesium technology.

Darton tried using machined magnesium risers back in the mid 1990s- they were a flop- they did not prove to be any better than a machined aluminum riser ,looked "cheap" (much like PSE's "forged" F series risers) , and required far more expense to manufacture properly because magnesium is much more volatile/flammable- they often snapped because the heat was not properly controlled thus weakening the molecular structure.