You either learn to manage it (and reliability/durability is manageable with all 3 of these guns), or you quit your day job and wear baggy, untucked clothing so that you can conceal carry a big gun.
While I agree that a pocket gun doesn't need to have 1k rounds without cleaning reliability, it still requires it prove that it can go through a mag or two many times a single malfunction after 40-50 rounds doesn't prove anything could be it never makes it though another mag too.It needs to get 7-14 (extra magazine)shots off reliably. That's what it's designed to do,
You traded a used LC9 (I presume the older hammer fired one and not the newer LC9-S) for a new diamondback? Used LC9's are worth MAYBE 200 bucks. I wouldn't carry such a cheap gun.
Judging by the responses here from those who say their Diamondback broke, and your statement that the gun already malfunctioned after one box of ammo, and your low expectations of its reliability, the Diamondback sounds like a cheap gun for those who want to carry a gun but not really shoot it.
I recently got an LC9s pro--and even though I have small hands I find the ergonomics of that pistol too small for my tastes in a 9--hard for me to get why someone would want something even smaller.
If you needed something smaller than an LC9, the Kahr CM9 would of been a better choice.
Just some details for clarification. The DB9 I purchased was new and cost about $310 all in (tax, NICS). I got $250 credit on my LC9 and made up the rest in cash.
The LC9 was reliable and in decent shape and I had the box and stuff that came with it. Still, I had put about 800 rounds through the LC9 and carried it regularly for a couple of years - so I got good use out of it. Also, I recognize that the LC9s is really a better gun than the LC9 (or most people will see it that way) and the LC9 in a couple of years will be hard to get rid of.
This was at a gun show. I went to the gun show with it already in mind that I was going to basically "swap" my LC9 for a DB9 - I was already familiar with the DB9, so this wasn't an impulse purchase. I simply needed something in 9mm a little smaller and lighter. I could hold out for a Rohrbaugh, but didn't want to spend that kind of money.
The DB9 is smaller and lighter than the CM9.
BTW, I just checked to see if any LC9's had bids on them on Gunbroker, and the only black one with bids is at $170. Tons of them on Gunbroker with no bids at all - there's no love for the LC9 anymore.