XDM automatically racks when inserting mag

[smak28]

A few times the mag has falling out after the first shot on me so I started putting them in with some force. Not a hulk smash but more force than normal lol

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This definitely shouldn't happen but it is quite possible that the blocked mag may be seated slightly higher than it should limiting the space of loading 10 cartridges. Do you have any issues loading the 10th round into the magazine? Also, try some factory 10 round (not blocked) magazines.

[plumbworker]

You have to understand these polymer frames can flex when slamming a full mag into the gun (some more than others) the flexing causes the slide stop to disengage the notch in the slide and therefore the slide drops.

I can do this on my g19 without inserting a mag just by wacking the empty magwell with an open palm will cause the slide to drop.

[OCEquestrian]

So kind of startles me occasionallyand was something went this keeps happening.

XDM 4.5 with ten round capped magazines. On last round slide open. I have to really slam the magazine in there for it to properly lock in or it will fall out. When doing this the rack will break loose and load a round in the chamber all in the same motion.

Never happens with an empty mag, neither the problem locking in or the automatic slide rack.

Any ideas why this is occurring? Since it's not everytime it definitely startles me when I'm not expecting it. Might be one of the mods installed, lighter power rod spring is installed.

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Design feature I think.. My HK VP9's do it every time!

[AreWeFree]

You have to understand these polymer frames can flex when slamming a full mag into the gun (some more than others) the flexing causes the slide stop to disengage the notch in the slide and therefore the slide drops.

I can do this on my g19 without inserting a mag just by wacking the empty magwell with an open palm will cause the slide to drop.

It's not flex, energy transfer causes the side catch spring to recoil, releasing the slide.

Ever turn the shampoo bottle over and tap it on your palm? Same thing here.

[jimbo74]

shot a couple hundred rounds through my xd9 yesterday, always had to send by slide back home every time. I am using 10 rd xd mags

[MosinVirus]

I am of the opinion that while it does happen it shouldn't.
My understanding is that the slide stop engagement surfaces geometry changes /wears and eventually even inserting the loaded mag will disengage/shake it loose. Some new parts (slide stops) can produce weak (not enough) engagement with the slide too.

Not familiar with XDM at all, speaking from experience with some other guns.

Personally I wouldn't consider this a feature.

[Nephthys]

I agree, certainly not an intended feature or intentionally designed. In my case for my g19, I always attributed it to it being a used training class piece. I don't think of it as a home defense weapon, so I never bothered getting all new parts for it

[OCEquestrian]

I am of the opinion that while it does happen it shouldn't.
My understanding is that the slide stop engagement surfaces geometry changes /wears and eventually even inserting the loaded mag will disengage/shake it loose. Some new parts (slide stops) can produce weak (not enough) engagement with the slide too.

Not familiar with XDM at all, speaking from experience with some other guns.

Personally I wouldn't consider this a feature.

My HK's have done that from day one new out of the box and they have never failed to lock open on an empty chamber either.....

[BrassCase]

Unfortunately I can't get my XD to do that, my Beretta 92FS will if I slam the magazine in hard. I've heard it called "The Birthday Bump" and I have no reason why it is called that either other than it is like getting a present when it happens.

[smak28]

OP - I suggest you get a factory 10rd XDM mag and see if it happens. My guess is that this will eliminate the issue and that should prove it is the blocked mags.

['ol shooter]

I own in excess of twenty auto pistols, and none of them do that. I would consider it a defect if they did. I do my own minor to moderate 'smithing and have armorers training. Go to ANY manufacturers site and ask them if this is a feature or a defect. If you find ONE that says it's a feature, post it here, I would love to see it.

[tanks]

Every one of my HKs and CZs do that.

[lurchnp81]

Happens pretty regularly with my Gen 4 Glock 19

[jmaglipay]

My xd9 does it often. My friends thinks it's badass when it does it.

[chomorro]

Lol so happens to a lot of people and also never happens. Hmmm maybe there is a difference is amount of force being used to slide the mag home.

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