Anyone build one or buy one. I just ordered a pistol lower that uses Glock mags from PSA. I already have a bunch of Glocks so it seems to work to stay with the same platform.
Next I have to figure out which upper to get. I think I am going with the FM Products 9.25" side charger upper or PSA 10.5"
Just wondering how picky they are? If they are like the pistols to get to shoot well?