Looks like i'm going to give the 419 a try. I like the looks of the gray ops a little better, but i have also seen the de burring issues first hand on other gray ops parts. The machine work has always been top notch but the last step of getting the burrs off is important. The M brace mounts cracking I have to assume has been fixed, i have never had one Crack and I have 5 along with several of the guys I shoot with. There is always a chance they just had a bad batch of material. I do like how the area 419 has the guide pins to help keep the cap from twisting, and i also like how they make the fasteners in house so they can choose what ever they want. I dont like how the rail clamping portion is moved inside, I just dont care for the looks and I also dont like the raw aluminum, but I get why they do it, I'm just not convinced it is needed. Thanks for all the input.