I currently have a 4516-1 and have personally put about 400+ rounds through it in the 4 months I've owned it. I haven't experienced any failures of any kind. No FTF, FTE, dropped mags, etc. The only issue I've had was when the magazine safety plunger and lever broke. And even then, the trip to the range before I discovered it, I put about 100 rounds through it. So somewhere in those 100 rounds it broke, but continued to shoot as nothing was wrong. I say all that to say I trust my 4516-1 with my life. Try to find one of the dash models 4516 (-1,-2, or -3).
-ep