I purchased it about for weeks ago but have not been able to get any range time b/c of the pandemic. Someone suggested locking the slide open to accelerate break in, but how long should it be kept open? All three mags were loaded when I picked it up.

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Old Cop
LEO (Ret.)

Only my .02 as i dont have the experience many others may have; but i have never done anything like that on a slide on my new guns. In fact i just take them out and shoot them (understanding many of our ranges are closed) when i can. And I dont think I have noticed any real difference between round 1 and round 100 or 500. Perhaps in how I get used to a new model and how it “feels” but not the gun itself.

If the mags were loaded already then this is a used gun?
If so, that break in may already be done?

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“Look life in its iron face”

I loaded the mags when I got it home. Sorry, I should have been clearer when I posted my Q.

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Old Cop
LEO (Ret.)

If we are to believe what the metallurgists and engineers tell us, (and I do, they know more about it than the rest of us), Locking the slide back and keeping the spring compressed will do nothing to "season" or break in the recoil spring and make the pistol easier to rack.
What will help is repeatedly locking back the slide, then letting it go forward. Over and over, many times.

Same with the magazine spring, loading the mags and letting them sit won't make the mags any easier to load. What will help is loading and unloading the mags over and over. That repetitive compression/ relaxation will weaken the spring, not leaving the mags loaded for days, weeks or years.
I'd rather just use a loader on new mags and let them break in on their own, than try to pre-weaken the springs, you'll just have to replace the mag springs that much quicker.

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U. S. Army Veteran

Never have heard of locking the slide back like described. Best way to "break it in" is to fire it, then fire it again, and again etc etc etc. Plus it is fun!! Enjoy you new gun!

Agreed. Just clean it, lube it and go and shoot it. Repeat as much as funds and time allow.

Old cop Is this pistol a M&P9c as in compact or a current 2.0 compact 3.6 or 4" .
Assume the break in will be far more about You breaking in to a new to you handgun . IF it is a first generation 9c that pistol could be a higher round count pistol of unknown history .

If nothing is know of the loaded ammo like brand and model , remove them give then to a reloader for bullets and brass to reuse .

Being used with no idea of rounds fired I would replace the recoil spring assembly . No need to rack the slide back and lock it .

When I got my M&P 2.0 compact I cleaned it, took it to the range and started shooting. Never had a malfunction in a couple of thousand rounds.

I have heard of people locking the slide back trying to weaken the spring so a pistol isn't so hard to rack. If that is not the case I wouldn't bother.

What's the Manual say?

IMHO the best thing to do with a new service style pistol is to read the manual and then field strip, inspect it, clean out the packing grease (if present), lubricate, reassemble, function check and then either do some dry fire or take it to the range.

As mentioned above cycles "break in" springs.

For service/defensive weapons I avoid esoteric break in rituals and detailed disassembly so that I don't accidental cause issues.

Congratulations and have fun with your new pistol.

I owned an occasionally carry the M&Pc 1.0 and it ran fine without any issues.

In answer to your Q it is a brand new, in the box, M&P Compact 2.0 9MM w/the 4” barrel & three 15 round mags that I loaded when I got it home. The genesis of my slide lock inquiry came from a member here and I thought it was unusual. When I was issued my Glock 23 service pistol our training included no such ideas, just lots of shooting to transition from revolvers to semi autos. I’m still waiting for our governor to OK the opening of ranges here, maybe two more weeks. It’s been cleaned & lubed so it’s ready to go.

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Old Cop
LEO (Ret.)

I wouldn’t Worry too much about it.

No worries, it was probably me misunderstanding.
I hope you enjoy yours as much as I have mine.

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“Look life in its iron face”

Perfectly stated and correct...

I have an M&P 40c (original version) with four 10-round magazines. It has 16,000 rounds through it, and the magazine springs are still going strong, so don't worry about having to replace them any time soon. It's a great gun. It needed no breaking in, and it has been my EDC for over five years. Just go out and shoot it.
Enjoy!

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What, me worry?

fooled me. been shooting m&p's since they came out. work and 3 gun. my carry gun is a 3.5" never heard of it. new wives tale. dont shoot a colt l.w. .45 too much, u will burn it up


gee 12,00 rds later feels allright to me


talltexan

I wouldn't worry about it. I think that once you get to the range, you'll find that your new M&P functions perfectly. That was the case with my full size M&P 2.0. That wasn't the case with my LNIB full size gen 1 M&P. It wasn't very accurate and it ejected casings on my feet. I changed the recoil spring which helped get rid of the pile of casings at my feet, but it didn't help much with the accuracy. I know mine was an oddity, but I had to let it go. My M&P 2.0 on the other hand is a keeper.

1. Clean
2. Oil
3. Shoot
4. Repeat

Having all the ranges closed has been VERY frustrating! I’ve had my 2.0 for over a month and still waiting, and it makes no sense since the retail area is open. I’m getting ready to order some bulk 9MM and wanted to know if there is a brand to stay away from.

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Old Cop
LEO (Ret.)

I'd like to know how you got one with 3 mags. Mine only came with 2. They must like you.
Thankfully, We have a range that has stayed open through all of this. I think because it's also a gun store. What has kept me away has been all the rain we've had this year.
Do as others have said, clean it, lube it, shoot it, repeat. They are very nice guns, you'll enjoy it.

I cleaned, lubed, loaded, and shot mine. It functioned perfectly from day one. No break in required. My 2.0 compact isn't my favorite pistol, but it's as reliable as anything I own.

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Or something like that . . .

In answer to your Q about three mags all I know is that’s how it came in the box. I may have read somewhere LEOs can get them like this. I purchased it, NIB, from a deputy sheriff I know but never thought to ask him about the extra mag.

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Old Cop
LEO (Ret.)

Old cop What ammo to use ?? Do not start with the bargain wallet friendly brands or steel cased . I tend to start off any new to me handgun with what I plain to carry but in a +P if the handguns rated for it to help soften it up ! one box of my choices to try . At least you will be sure it runs with your preferred ammo . I'm not much of a 9mm guy but since hst has been out that is preferred load followed by range t series .

I have made our own reload practice ammo since I retired and use Missouri bullets coated swc 124gr in 9mm now but in the past working years Georgia Arms ammo canned heat was good reliable practice ammo back when work did not allow reloading time and they have good HP both new starline brass or once fired for carry if you still like gold dot .

Depending on where you live you may have a smaller ammo company or two you can read up on and try that offers a high quality range ammo line . Be sure the ranges you visit don't require a frangible bullets made from compressed copper powder . Thant changes everything .

How about unmonitored smaller forestry ranges . There open near me but .
The family has shoot a lot of this 9mm below in years gone by and we have shoot a far amount of there +P HP Gold Dots but listed sold as speer bonded unicor . I shoot 40sw !

I'm sure others will have opinions of todays practice ammo .

http://www.georgia-arms.com/9mm-luge...l-jacket-nato/

Thanks, had not considered starting off w/self defense ammo. I’m going to contact my former department to see what they’re issuing.

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Old Cop
LEO (Ret.)

Don't be scared to shoot SCA. There are TOO MANY old wives tales about SCA. I think most stay away from it because they have a HUGE lump in their throat called PRIDE, and they're afraid to swallow it! Shoot as much SCA as you want. Your M&P will eat it like a kid eats candy. I know all of my M&P's shoot it without ANY hiccups.

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How many guns are too many?

Pls excuse my ignorance, but SCA?

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Old Cop
LEO (Ret.)

SCA = Steel Case Ammo

I've had my 9C for about a month almost and leaving the 12 round mags fully loaded this entire time has made them insert into the gun easier.

I can see the logic in letting the gun sit with the slide locked open, if the recoil spring is going to take any initial set then it will, but it's not going to harm the spring

I've got near 1200 rounds through my 9mm 2.0 Compact, 4" barrel. I didn't do any break in other than field strip and clean it before the range trip. It hasn't bobbled even once.

My indoor range finally opened so today I put 200 + rounds of FMJ & HP through the gun. It ran flawlessly, was accurate out to 15 yards and I enjoyed shooting it a lot more than any Glock. Using the large backstrap insert it fits me like a glove, and the rough grip glued the little gun to my hand, no need to adjust my grip between shots. Smith has a real winner here.

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Old Cop
LEO (Ret.)

Aces!

Sent from my XT1710-02 using Tapatalk

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CPT, Armor (Ret)
Luke 22:36