By itself probably 3/5 - Matrix Arms Alpha Glock 19 Gen 3 Pistol Slide

Slide looks good. Cuts make slide very light all internals from orginal glock slide and upgrade internal fit and function well which is why has a 3/5. If you want an affordable and light slide. It's a decent choice. Now the cons. Bought three sets of iron night sights. Thinking i just bougt the wrong ones. None fit. Even with hammer and punch into place would not advance. Needed to take a Dremel with diamond blade and mark with a micrometer where to cut. Now matrix may have a parts list of compatability somewhere. But I did not find it. Likely my user error but added to frustration on what should have been an easy upgrade.