I have this kit - it's great.
I am curious if anyone has ever found a magazine fast loader for these.
Black Dog makes a mag loader for these mags.
I'd buy that speed loader with a adaptors for ruger 10/22 (aftermarket mags), AR15-22 mags, and Remington 597 mags. Perhaps something for some of our AR15 focused LGS's to consider?!
Reviews online are really good. There is a mention of a firing pin break from one person at about 2000rds.
I just ordered one, as I am sitting on 8000rds. I'll put it through its paces at ATS.
I don't always buy from ArmsEast, but when I can, I do. Walter is pure gold.
You can buy a few spare firing pins to put your mind at ease ... these kits are great especially the dedicated uppers.