[ILLusion]

Personally, I like both Freedom Art as well as Shooters Design.

If you want lots of choice in varieties and lengths (rails, no rails, scope mount bases, compensators, extra length, Kimber style, etc etc) then go with Freedom Art.

If you want something realistic to build a Strayer Voigt Infinity or STI replica, then go with Shooters Design - it's pretty much as simple as that.

I haven't worked with the Airsoft Surgeon / ProG4 frames yet, but I have several on the way. If I were to judge them based on the construction of the other Airsoft Surgeon products I've used in the past, I would say that despite costing a premium, they would be totally worth it and direct drop in replacements, with perfect fit and function, especially with other parts of the same brand. The downside is that they do not yet have limited frames, so if you're looking for a long dust cover design, you'll have to stick with Shooters Design. However, they do offer a bit more variety on top of STI & SV with Limcat choices.

Freedom Art frames I've found about 95% of them requiring some level of filing to the rear rail areas that the slide fits on or sometimes modification of the hammer hole for widening. I have come across other random issues here and there but are all fixable with a set of small files. Know what you're doing if you're doing fitment with a file or you could render your gun useless if you mess up the frame.

Shooters Design frames I've found to be built generally very well with very crisp edges and corners all around and a great anodization process, although the fit does seem to be a bit tighter in tolerancing. This tolerance issue between the FA and SD frames are a result of the manufacturing process (and thus, the price) as the Freedom Art frames are die-casted whereas the Shooters Design frames are CNC machined from a solid block of aluminum.

Overall, I say get whatever suits your needs/looks/appearance more - the STI/SVI look is not for everyone and in that case, Freedom Art is your only choice. But if you're looking at building a replica of a competitive shooting pistol, Shooters Design and Airsoft Surgeon / ProG4 are right down your alley.