M&P 45 mid size battery question

[bloodlord77]

I just bought a mid-sized M&P 45, and have only putt 100 rounds through it. When the pistol is chambered, and i pull slightly back "as if to do a safety check", and let go, the gun does not go into full battery. I have to tap the slide the rest of the way in. When dropping the slide release, or during firing, it goes into full battery every time. I've had zero failures to feed or extract, and it fired perfectly every time i pulled the trigger. So is this something i need to worry about, or should I just chaulk it up to not being broke in well enough?
Thanks in advance for any help.

 

[Dragon88]

Chalk it up to the gun performing exactly as designed. The extractor must snap over the rim of the cartridge, and you letting the slide go from a partially open position is not providing it with enough energy to do that. This is common to nearly all self loading firearms, not just your gun.

A tap on the rear of the slide to ensure the pistol is in full battery should be part of your press check sequence.

 

[BoDog]

I just bought a mid-sized M&P 45, and have only putt 100 rounds through it. When the pistol is chambered, and i pull slightly back "as if to do a safety check", and let go, the gun does not go into full battery. I have to tap the slide the rest of the way in. When dropping the slide release, or during firing, it goes into full battery every time. I've had zero failures to feed or extract, and it fired perfectly every time i pulled the trigger. So is this something i need to worry about, or should I just chaulk it up to not being broke in well enough?
Thanks in advance for any help.

Sounds like a burr some where in the chamber area try a stainless steel brush on a drill. Take special care to stay out of the rifling.

 

[bloodlord77]

"At the risk of sounding like an idiot", what would happen if the trigger was pulled when the gun was not in full battery?

 

[chuck s]

1. The extractor does not "snap over" the case rim in the vast majority of auto loading pistols including the M&P. These use controlled feed whereby the cartridge case rim slips up and behind the extractor during feeding. If you drop a round in the chamber and close the slide the extractor has to snap over, but this is not how the pistol functions.

2. If you retract the slide a bit to check for a chambered round the resistance in closing is the barrel rotating up into battery and locking. We want this to be tight and bumping the rear of the slide is a normal, common requirement after a chamber check. A drop of CLP on all four corners of the where the barrel locks into the ejection port will help, but this is normal.

3. The disconnector prevents the pistol from firing before the barrel and slide are locked together. Recall that the barrel has to cam up into battery and if it's not all the way up the firing pin is not aligned with the primer too.

You can personally verify the three items above with some snap caps and a little hand manipulation of the slide.

-- Chuck

 

[bloodlord77]

Thanks for the helpful info. I also have a full size M&P 357 sig, and it doesn't do the same. Had me a little concerned.