I have been issued three guns in my career.
Sig p229 in 40sw
Glock 23 gen3
Glock 22 gen4
I have never been allowed to carry anything else on duty other than the issued sidearm.
The 229 worked fine as long as it was wet with lube.
The G23 was the worst. Horrible size for uniformed patrol. It was chosen by pencil pushers to appease a dept wide policy of one gun for everyone and the ones doing the choosing were plain clothes admin types.
The g22 gen4 is fine but it does throw brass every so often at your head even with the "updated" parts
If I could choose for myself it would be a Beretta 92 series or fully tested 1911.