With the Covid-19 stay at home orders and not being able to go to the range, for the first time in around 15 years I setup my 22 trap and pulled out the old Gamo P-23, the only airgun I still had. After about a week the single shot Gamo got kind a little old, so I picked up the 8 shot pellet Umarex M1911A1. I like the thing, but the double action trigger is terrible, single action is fine and the thing is accurate.
Because of the trigger on the 1911, I have a blow back Umarex CP99 BB pistol on the way. From what I've seen of the various blow back pistols I would usually stay away from them. The big problem every one I've seen has, including the Gamo PT-85 I bought and returned years ago, is the barrel and slide with the sights have too much play to ever be accurate. However, for the CP99 I really don't plan on doing anything more than speed drills and won't be more than being 15 feet away, which I hope it's good enough for.
I also bought a Crosman DPMS and have to say the thing is just fun. It's not all that accurate and be prepared to buy CO2 in bulk, but it's accurate enough at 30 feet, and it shoots full auto.
Funny thing about the stay at home order now that I think about it, I have not shot an airgun in at least 15 years, but now that I'm stuck at home, I've bought 2 pistols and the DPMS, built a BB trap that I'm trying to perfect, and with the accuracy limitations of the DPMS I find myself shopping for an pellet rifle.
[Update 5/21]
The CP99 arrived yesterday. Slow firing from 15 feet it group at 1", which is better than I thought it would do. Since all the Umarex blow back CO2 pistols appears to be the same mechanically, I would guess that the others would be about the same. Don't know if this is good enough for the OP but it's what I got out of it.
There is one thing about it that I should have realized but didn't, and most people probably won't care about, is the safety. An actual Walther P99c only has a de-cocking lever since it's double/single action, so to add one on the single action only CP99 they setup a lever on the back right of the slide. With the way it's setup you need to use your other hand to go from safe to fire, so there's really no way to practice from a holster (and use the safety.)