Yes. you can buy just the riser. I have had two of them. If you buy the limbs from LAS, they will supply the necessary bushings for the ILF limbs. If not, there are directions on the internet to make your own, which is what I did. It's very easy to push out the ILF fittings, and push in the pins required. A vice, small arbor press, or wooden dowels the right size to tap out/in the fittings. Lee at Lancaster can tell you approximate weight add or subtract for different length & make of limbs. I used medium Samick Extreme carbon/foam limbs on my last GM II riser, and it made an awesome bow. Bill G.