I got to shoot my 21 today. I bought it yesterday used. I am still not sure if it has the stock recoil spring/guide rod assembly, but other than that, it is bone stock with the 5 pound connector. It has the stock Glock plastic fixed sights and is a third generation without the loaded chamber indicator. I shot about 50 rounds of Winchester white box (230gr. FMJ). The 100 round bulk pack from Wal-Mart. It sells for about 20 bucks. I shot mostly 3 shot groups and some 6 and 9 shot groups. I shot targets at 7 and 15 yards. I kept nice, tight groups throughout the range session (nothing over 2 inch spreads, which is ok for me). I noticed only one malfunction. It was a last round failure to feed. It just sort of hung at an angle in the barrel. It reminded me a lot of how a 1911 will do something similar. It could have been the ammo, me, or that I have no clue when the last time the gun was cleaned. I noticed the recoil was a bit stouter than my 1911's. Even my ultra light guns seem to have less felt recoil. I guess it could be me, but I could feel a definite difference. Overall, I must say I am no less than impressed with the gun. The ergonomics are great (I have big hands), the recoil is no problem at all, the gun functions well and it is accurate. What more can I say? I plan to carry it daily once I get about 400 or so rounds downrange. Whoever had it, did not shoot it hardly at all. I am sure it sat on a shelf in a gun safe for a few years.