Mine works fine, seems to run ok, of course uses 9mm AR magazines, switching back and forth with the Tavor 5.56 components is not what I consider simple and quick (not like just changing the upper and putting in the magwell block is for an AR)
I have only fired it with hardball loads, no idea if JHP ammo presents an issue, accuracy is not something I have really tried to seriously measure yet but it zero'ed pretty quickly and gave me a solid 2" group at 20 yards with my 124gr handloads using a 2moa red dot.
I bought the conversion for a range toy, and not a serious use platform in my case. There may be issues with JHP ammo, accuracy, reliability, that I am not aware of.
What do you think of the Beretta CX4 carbine for PCC?
To have fun shooting PCC, bring whatever. To be competitive, you want a carbine that is soft shooting, red dot sighted, easy to reload fast, with a good trigger, that holds +/- 40 rounds.
Likes pretty much everything in every caliber.
It has taken me a bit of effort to get used to the Sig MPX. Initially, I shot it like a blow back AR9, and it cycled like a blow back AR9. Then I realized, at least out to 25 yards, I can use one sight picture and two presses to get follow-up shots under .20. This is shooting steel at 20 something yards -- when I do my part, it is five hits under 1.50 from the extended ready:
Likes pretty much everything in every caliber.
I built a PSA 9mm AR a couple of years ago so I could shoot steel in the pistol bats - it is a lot of fun to shoot. I have used it at the local outlaw PCC matches before PCC was official.
One of my shooting buddies let me shoot his SIG MPX SBR and I had to have one. I bought a SIG MPX pistol and I am waiting on my SBR "stamp". I plan on using a SIG factory folding skeleton stock when I want the folding stock capability and I plan on using one of the AR buffer tube adapters for an AR stock when I want more of a "fixed" stock. I have a railway Cmore on the MPX. I would have no problem using the SIG MPX in an HD role as soon as I can officially SBR it.
Also, I have been picking up MPX Gen 1 mags on sale - I posted a link on "holiday deals" thread. MIDWAY has SIG mags on sale today too.
How is the seating of a magazine loaded to capacity on a closed bolt? With my ar, it can be done but with a lot of effort, and can't be done consistently. On a start that requires the gun be unloaded, I start with locking the bolt to the rear and then insert the magazine. It takes a split second to do it that way but works 100% of the time.