Ming the Merciless

Yes, any 2011 magazine will fit, STI, SVI, and MBX.

Taran Tactical sells an extra power spring for the MPX 30 rd mag. It is 4 coils longer and a thicker wire diameter for use with +10 round mag pad extensions. Clip a couple of the extra coils off for use in a stock 30 round magazine.

Grottulf, go over to the Rimfire Central forum. They have a section just for the M&P 15-22 with lots of good information. It's easy to free float the handguard, but it does require some different techniques than a regular AR. To remove the flash hider, you have to grip the barrel because if you clamp the upper receiver, the barrel will spin in the poly receiver and ruin it. https://www.rimfirecentral.com/forums/forumdisplay.php?f=305

I would suspect a split/cracked case with a full powder charge. Low neck tension and a ventilated case equals low pressure, and less noise.

Fixed it for you!

Yes, No, and Maybe. Yes, the 15-22 is more reliable than the Nordic. Mostly because of the better magazines. No, the 15-22 is not compatible with ALL AR triggers, it will work with MOST, but like the Nordic and most other .22 AR, the firing pin is just a little bit higher than in a centerfire bolt and not all hammers will hit the firing pin. Maybe, the Nordic may work with your JP trigger. I have not run a JP trigger with my Nordic. I have run Jard, Geissele SSA, & Hiperfire 24C in my Nordic upper. The 15-22 is considerably lighter so you may be able to transition a little quicker, but the trade off is less stability for longer off-hand shots, so again maybe? If you go with the Nordic, if you can buy a Better Mag adapter in Sweden, get one. It lets you run the better 15-22 magazines and has a functioning LRBHO. The Black Dog magazines used by the Nordic and most other .22 AR do not activate the bolt stop. Instead the bolt is held open when it hits the empty magazine follower and the bolt drops to battery when the magazine is removed. Oops, my bad! I have the Better Mag Adapter in my both of my CMMG type .22 AR. I don't have one in the Nordic, which leads me to the question of why there isn't one? It may or may not work, but I don't recall if I've tried it. They say as you get older the first two things to go are your memory and something else???

I've seen a couple, but they were home brew 3d printed. They were a very simple design and were just glued on.

This thread is useless without embarrassing video!

If Winchester is going to reimburse you for the repairs, I would send it to Les Baer and have them put on a new slide. Their repair turn around time is very good.

If you're handy with a hacksaw/dremel tool, a belt sander and a .201" drill bit, the original standard C-More Serendipity standard switch with frame mount can be easily turned into a Slideride. They are much cheaper, $145 on Amazon. https://www.amazon.com/C-MORE-Systems-Serendipity-Standard-Switch/dp/B00D4L2G2C/ref=sr_1_4?dchild=1&keywords=C-MORE%2BSystems&qid=1577044117&sr=8-4&th=1&psc=1

That's putting it very politely!

I must be strange because I really like 3 Gun shotgun! Pump Riot Gun? Yes, please! Pike length Beretta 1301? I have 2, thank you! Box fed Turkish Delight? Yup, one of them even has some of the original parts! I like Sporting Clays and I'm OK at it, but the local crowd is pretty snobbish, so I like to bring my Mossberg 500 just to piss them off. My Citori is just barely good enough not to draw a sniff of disdain. I'm not real big on Trap or Skeet, but if I think of it as aerial Steel Challenge, it's not so boring and the local group is pretty friendly, but the gun handling, yikes! I've never been smacked in the head with a buttstock in 3 Gun by a guy walking around with his shotgun over his shoulder. But only 3 Gun lets you slam targets as fast as you can pull the trigger, require mixing Buck, Bird and Slugs, play Circus games with spinning, swinging, and flying targets! I mean, what's not to like? Seriously! Oh, I guess spending 15 minutes, 3 times a week for a couple of weeks to learn quad loading is too hard?

With the occasional need to be able to run major with heavier bullets for spinners, and heavy steel.

Load the mag to capacity and leave it loaded for a couple of days so the spring will take a set, then it will probably work OK.

If you're getting 1 primer failure in 500 rounds loaded, that is absolutely NOT the same rate as new factory ammo. That failure rate is more like 1 in 300,000 rounds. Based on SAAMI testing US made primers are statistically 99.9997% reliable at the worst.

Magnetism? Are you picking up the nas3 cases with a magnet?

The extra mags are for malfunctions. Dump the jammed mag, rack the bolt a couple of times to clear the action and stick a fresh mag off the belt. Why dick around with a mag that has already had a malfunction (even if it wasn't a mag problem)?

These were originally developed for Airsoft AR/AK magazines which are quite delicate. I use them for all my rifle/PCC/shotgun mags. Airsoft stores regularly have them on special for $14. https://www.amazon.com/NcSTAR-VISM-Mag-Ready-Carrier/dp/B007XPB5U4

You would think wrong.....I don't social media. I'm just barely sociable enough for this forum.

Post them over on Doodie! That place has been a ghost town for months. Be sure to post face shots with the finger on the trigger.

Your great trigger may be a junk trigger for another shooter. If the customer doesn't accurately describe exactly what they want in a trigger, ie. how much take up, how much overtravel, how the reset should feel, etc... and even if they do describe it perfectly, they may get what the gunsmith feels is an excellent trigger, but is still not to their taste. I generally don't worry about what the trigger on a new gun feels like because I'm going to be making adjustments to it anyway, although I have been surprised and gotten a perfect for me trigger a couple of times. More important to me is the reliability and accuracy of the gun and whether the 'smith is willing, able, and how quickly he can correct any issues other than trigger feel.

Two guns for the price of one and an extra 2011 grip frame?

Round falls off the extractor, falls through the grip frame case head first, primer lands on pointy rock, round detonates, frags to the nads of shooter or RO. Worst case, primer lands on another round, both detonate and frags both shooter and RO in nads. Not serious!

And vague third or fourth hand criticisms have what value? As Yigal said minor tweaks to trigger feel are very common at high levels of shooting, too much take up, not enough take up, too much overtravel, not enough overtravel, too light, too heavy, etc.... A good question would be, did the gunsmith make the adjustments requested, did the shooter even make the request or did they just make the adjustments themselves and then complain about it or did they just mention they made the adjustment, no big deal. Before making judgements about a gunsmith, direct reports from several customers would be good. One has already posted with positive comments.

That part is the "Competition Long Elevator for 1301 Comp Pro, 12ga" p/n C7C121. So far haven't found one in the US. http://estore.beretta.com/en-eu/elevator-long-for-1301-comp-pro-12g/