Whatever the detent is, that holds the Solo's slide-lock down until the magazine's follower hits it, has become too weak.
It may be that there's still sticky anti-rust grease in the detent's hole or notch.
It may be that the detent's spring fell out, so it isn't functioning.
Something like that, anyway.

As each round is fired, its recoil is moving the slide-lock lever upward, and it catches the slide.
Look for too much "wiggle" or looseness in the movement of the slide-lock lever. Trace the reason for that, and correct it.

Put a loaded mag in it and look straight down noticing how close the bullet and slide lock are,if it looks close look for skidmarks on the edge of the SS's tab that the follower engages.I can see the 147s but wouldn't really expect it out of a 115.It's Steve's or this most likely

Thanks for the responses guys! I found the problem though. Hey, I'm a guy and I don't need no stinking instruction manual, right? Wrong! The slide stop has to be installed pointing down and then pushed up into place going under a little spring or the slide locks back every time. Being and old 1911A1 guy, I just pushed it straight in, not engaging the little spring. I'm embarassed to say, but have to give credit to Kimber, this procedure is printed in RED in the manual.

Duh!

If you watch the video on the Kimber web site, it goes into detail about exactly what you are talking about. The slide stop has to catch the spring or it will lock every time. Enjou you Solo I have been waiting 14 months.

Thanks, it running like the well designed machine it is once it got over operator error. Where are you? There are 2 shops here that have all the Solos you want.

I am in the Boca Raton area where are the two shops

Probably a 3 or 4 hour drive, minimum. Florida Gun Exchange has some in Holly Hill and does business on the internet. The othher, and probably best price, is Shooters Supply in Jacksonville. I think they sell over the phone also.

Florida Gun Exchange

Shooters Firearms and Gun Accessories

Thanks i'll call

New here, so hello to all.
What kind of prices are these shops offering? Locally they run the gamut of $599 to $799. I snagged mine from a shop asking the higher amount, but they gave me a decent trade so it was a moot point.
Great little gun; mine had fed everything including snakeshot.
Moon