Disappointing AR9 news

On a previous post I mentioned that I was going to spend Sunday building an AR-9 pistol.

Spike's Tactical has a good reputation and I managed to acquire this for a decent price. I was lacking some part which I got at a gun show on Saturday and on Sunday I finished the lower without having to search for flying springs or much cussing.

The I tried to mate the KVP upper and it simply would not work. It refused to seat.

I inspected the inside and I saw that there was contact between the upper and that wire-thingie holder (Yeah technical name)

I did a silly experiment: I mated a PSA lower from a pistol I have and there was a perfect match. I even managed to shoot one round through it.

I hate complications on stuff that is supposed to be simple. I am not going to go the Way of the Dremel and suddenly I dread to go chasing another lower from another brand to see if they fit, especially after doing some reading in different forums and realizing AR9s is not an area known for its standarization.

I will be looking into some of the conversion/adapters for stardat lowers out there and a couple look promising.

In the meantime, if anybody is interested in a 9mm stripped lower, email me.