I didn't buy it for the cool factor or to show off at the range, just the simple fact that I wanted to shoot my AR's and not spend a mint on the ammo. It's definitely not the same as shooting 556, but at least you get some good repetitions with you weapons. Mine shoots straight, can put some decent groups at 50 yds. Heard good things on Tac Sol and the CMMG conversions. I went with Spikes because of the quality and customer service. I actually talked with Tom(Spikes armorer) a few times to figure out what configuration worked best for me. All I can say is read as much as you can, theres a lot out there.