I almost bought one. Shot with one. They are amazing. The guy that designed it (something Browe) was the same guy that designed the acog. Trijcon has all the rights to tritium though (or something like that) hense the LED technology. However the eye relief is absolutely horrible. Other than having the optic surgically installed to your eyeball your going to have a hard time seeing through it once mounted. I love the optic and if they fix the eye relief i will buy one. I challenge you to find a picture of one mounted that isnt on the last slot on the rail. Its so close the charging handle is hard to get to.