Most companies use Gordon in some way, shape or form.

Hoyt buys their glass from Gordon and manufactures the limbs themselves.

Some companies have Gordon build a limb layup to their own spec and Gordon produces the bulk layups and then the limbs are precisely cut/machined by another company (who specializes in such matters) such as Patton.

Gordon also offers their own “stock” layups such as “power-tuff, bo-tuff”, etc which is what a great many manufacturers (especially smaller ones) buy. Some of these are just fine and dandy and some are pretty cheap as far as limbs go.

PSE’s Magnaglass limbs are built “in house”. The straight solid limbs they used on models like the old Durango, Enforcer, etc. were at one time built by Barnsdale, which is widely regarded as one of the best if not THE best limbmakers out there. However, I’m not so sure PSE is using Barnsdale anymore. The newer bows I’ve seen don’t quite look the same.

Martin, Merlin, Darton, and some other companies produce their own limbs. Whether they buy raw materials from Gordon or not and then build I’m not sure of. I suspect Martin & Darton do, but Merlin probably has a supplier in their neck o’ the woods.

Personally, after many years of being a “have to have the “elite” limbs on my bows” type of tech head, my feelings now are pretty much that 99.9% of the archers in the world probably would never know the difference from a shooting standpoint from a Gordon limb to a Barnsdale or whatever. I can’t see where my Barnsdale equipped PSEs, Martin XRG Limbs, Darton Limbs, or Hoyt XTs’ offered any noticeable advantage killing animals or spots or what have you. Mathews doesn’t use a high end “elite” limb (they use a Gordon style limb, but word is they are made out of the US), and they’ve whipped up on everyone else’s limbs in 3D and won some big spot shoots too. :shrug: These "elite" limbs biggest benefit is likely longevity over a several year span.

How well the limbs are matched, shaped & cut/machined & how precise the axle hole & limb bolt hole drillings are done are considerably more important factors for accuracy than who makes them.