Cavalry Manufacturing has been working on a new lower for the SCAR MK17S for some time now. I was recently given a prototype to test with my MK17S.
The upper on the SCAR is the regulated serial numbered part, so the lower is basically a trigger pack/magwell module. The Cavalry Manufacturing unit is machined from aluminum billet and accepts the parts out of your existing SCAR MK17S lower.
I will be testing a production unit in the future.
I've been competing in the action shooting sports since 2002. I believe competition shooting to be an excellent way to build gun handling and marksmanship skills and encourage all gun owners to seek out some form of competition shooting. Anyone can become reasonably good at it if they devote the time and resources to do so. Winning, while nice, need not be your goal; bettering yourself through the pursuit of excellence is something we all can achieve.