I had a full-size Brolin that worked fine. However, I also had a compensated cut-down version, the Patriot, that was the worst jammomatic I ever saw -- I'd estimate 25-30 percent FTF. I know other shooters who have owned Brolins, and my experience is that their QC is spotty -- some work reliably and some don't. If I couldn't test it out before buying, I'd stay away.