IIRC, the QA1 piece is only about 30-40# less weight than the stock K. This is because they had to add so much more structure back into it to maintain its rigidity. It will utilize all OEM parts such as control arms, steering box, brakes, and T-bars so if you have good pieces there, it will minimize your cost of conversion. However, if you chose to go full tilt with all their tubular components, new rate T-bars, bigger binders, and a Borgeson steering box, it will cost about $1200 less than a comparably equipped AlterK.
The original QA1/CAPP tubular frame may have been 100# less than stock once built out. Of course, they also had rigidity issues with it and weld failures on their control arms. I believe AlterK is also claiming a 100# reduction with their unit.
The nice think about the QA1 vs AlterK set up is you really could modify in stages using their parts. With an AlterK, you have to swap out the whole thing all at once to utilize it. That's a $4500 hit to the checking account all at once.
The Magnum Force unit is all chrome-moly steel, so while it appears huge in comparison, they are claiming the entire set up is 20# less than stock. Personally, I think most of that weight loss is in the brake system. They list it for $5000, so it is about $500 more than a fully speced AlterK unit.
