I'm absolutely going to check that out, thank you! I always thought a hook-type hammer made a lot more sense than the short-throw notch. I don't like all the stress the standard design puts on the pins and the pressure it puts on the hammer/trigger, making it prone to be gritty and have a hard pull. I've seen similar designs to what you're talking about, but mostly in modular units that start at $300. All my ARs except my A2 Colt have plastic lowers, so pin-hole wear and flex in the receiver slabs contributes to a mushy feel of a "mil spec" FCG. I'm not sold on the two-stage part for an AR, but I'll try anything once.