quote:

Originally posted by FrankMoses:
Well, after nearly a month of owning an MPX-C, I was finally able to get out and shoot it today. Illness and busy weekends worked against me.
Overall, it was a very positive experience, but it started out badly. The first round or two from the magazines I stuffed full of 30 rounds a few weeks ago to compress the springs a bit would not reliably feed. They got the bullet in the chamber but the bolt wasn't fully closed. Click. After clearing a couple of rounds, it started to go bang and never stopped. No failures of any kind, other than the first round, actually first two rounds, from the magazines. When I started loading them with 25 rounds, there were no problems at all. Not sure what that was all about.
Also had to lower the front sight a lot to get it where I wanted at just 10 yards. But all the time it was cutting out one hole groups from the sandbagged front end rest. Not a huge fan of the factory sights, but even with 65 year old eyes, they did the job just fine. Offhand I was able to keep 50-60 shots in a lemon sized hole at the same 10 yards, even when shooting fast. The reset is superb.
I'll run some pictures out at some point, as I installed an adapter that now holds a buffer tube and a Magpul SL stock. Also put the Magpul SL grip on the gun, as I have gotten to like the more vertical angle.
Other than the unwillingness to feed the first couple rounds out of the fully loaded 30 round mags, it was all I could hope for. Hopefully that is just a magazine spring issue, and under loading them "solved" the problem.

quote:

Originally posted by dwd1985:

quote:

Originally posted by Dwill104:

quote:

Originally posted by FrankMoses:
Well, after nearly a month of owning an MPX-C, I was finally able to get out and shoot it today. Illness and busy weekends worked against me.
Overall, it was a very positive experience, but it started out badly. The first round or two from the magazines I stuffed full of 30 rounds a few weeks ago to compress the springs a bit would not reliably feed. They got the bullet in the chamber but the bolt wasn't fully closed. Click. After clearing a couple of rounds, it started to go bang and never stopped. No failures of any kind, other than the first round, actually first two rounds, from the magazines. When I started loading them with 25 rounds, there were no problems at all. Not sure what that was all about.
Also had to lower the front sight a lot to get it where I wanted at just 10 yards. But all the time it was cutting out one hole groups from the sandbagged front end rest. Not a huge fan of the factory sights, but even with 65 year old eyes, they did the job just fine. Offhand I was able to keep 50-60 shots in a lemon sized hole at the same 10 yards, even when shooting fast. The reset is superb.
I'll run some pictures out at some point, as I installed an adapter that now holds a buffer tube and a Magpul SL stock. Also put the Magpul SL grip on the gun, as I have gotten to like the more vertical angle.
Other than the unwillingness to feed the first couple rounds out of the fully loaded 30 round mags, it was all I could hope for. Hopefully that is just a magazine spring issue, and under loading them "solved" the problem.

Same exact experience with my first MPX Carbine outing today. Two FTF on a full 30 rd mag. Round fed, but bolt stopped short of being closed. Tried 29 rounds, but it was hit and miss. 25 rounds worked like a champ. Other than that, which I'm sure is a mag issue, it ran great. Even didn't mind the trigger, which didn't feel as bad during actual firing as it did during dry firing. Sig and Lancer need to get a grip on the mag issue.

Stiff mag springs when new is, IMHO, normal and a good thing. The mags feed reliably once broken in, and I would much prefer to have to break in a magazine then have a magazine with a weaker spring from the get go.

quote:

Originally posted by Cntrl23:
I'm looking forward to getting the .40 Caliber Exchange kit with an 8" barrel. It will compliment my 4" 9mm barrel very well, and I currently have a supply of .40 on hand that I only use in my Glock 23. Plus I'd assume I would only need to purchase the .357 Sig barrel and not another kit IF I wanted that capability down the road.

On another note, my credit card was just charged for a Sig keymod foregrip with hand stop (GRIP-HS-KEYMOD-BLK) that I ordered from Sig CS at the end of January. I had a 4.5" Keymod K Handguard on that order as well, but wasn't charged for that yet.

quote:

Originally posted by terry6v:
I have a question about the 3 lug adapters that I can't find searching. I just got the 13.5x1 3 lug adapter from hkparts. It looks like really thin metal. There is no extra spacer to accommodate for the larger diameter threads. It looks like they just made the metal really thin to get the threads inside the same outer diameter . While this keeps the original look and length, it makes it look really flimsy. Has anyone used one from them? From reading I can gather that TROS are better if you can get one. I was just hoping to get some feedback from somebody that has already shot with one. I don't want to mess up a new can. Thanks

quote:

Originally posted by terry6v:
I have a question about the 3 lug adapters that I can't find searching. I just got the 13.5x1 3 lug adapter from hkparts. It looks like really thin metal. There is no extra spacer to accommodate for the larger diameter threads. It looks like they just made the metal really thin to get the threads inside the same outer diameter . While this keeps the original look and length, it makes it look really flimsy. Has anyone used one from them? From reading I can gather that TROS are better if you can get one. I was just hoping to get some feedback from somebody that has already shot with one. I don't want to mess up a new can. Thanks

quote:

Originally posted by LDD:

quote:

Originally posted by terry6v:
I have a question about the 3 lug adapters that I can't find searching. I just got the 13.5x1 3 lug adapter from hkparts. It looks like really thin metal. There is no extra spacer to accommodate for the larger diameter threads. It looks like they just made the metal really thin to get the threads inside the same outer diameter . While this keeps the original look and length, it makes it look really flimsy. Has anyone used one from them? From reading I can gather that TROS are better if you can get one. I was just hoping to get some feedback from somebody that has already shot with one. I don't want to mess up a new can. Thanks

I haven't seen the HKparts.net 3 lug adapters, but if you need a TROS one, send me an email--my shop carries them.

quote:

Originally posted by dwd1985:

quote:

Originally posted by SuperPollito:
FYI (and this may depend on examiner) but my Form 1 was rejected because I listed the item as Sig MPX-P rather than Sig MPX.

Yup, I had the same thing happen. Re-submit with just "MPX", then call your examiner with your old and new case numbers. They will expedite the
process, and it should only take an extra 4 or 5 days.