Sometimes the slide locks back, sometimes not…

[TXAZ]

It may be some compatibility issue with the “other brand “ magazi, but sometimes my 2011 locks back on some magazines and not on others.
What cut / notch causes the pistol to lock back, or is it something else?

 

[usmcpmi]

2011?

Sent from my SM-A125U1 using Tapatalk

 

[ZX9RCAM]

2011?

Sent from my SM-A125U1 using Tapatalk

Double stack 1911.

 

[General Zod]

2011?

Sent from my SM-A125U1 using Tapatalk

Modernized 1911. Might be a double-stack 9mm, might be a .45ACP just with updated features, lighter frame, bull barrel, ambi safety, accessory rail, etc. Several brands market their modernized 1911's specifically as 2011's.

Here's an example:

 

[Big Dipper]

I have had issues where a manufacturing burr on the inside of the magazine (1911) body will catch the follower, preventing it from advancing far enough to engage the slide stop. Honing/filing the burr solved the problem.

 

[usmcpmi]

Double stack 1911.

Ugh...ok.

Sent from my SM-A125U1 using Tapatalk

 

[Coon]

Could be the plunger spring is weak. The small plunger that pushes the slide lock has a small spring inside the tube. On my 1911 I had that problem. It had me scratching my head till my hair was falling out. Not making any promises, though.

 

[Dawico]

You sure you're not riding the slide stop with your thumb?

Slowly racking the pistol with an empty questionable mag may show you what's going on. Could be a few different things.

 

[lonestardiver]

It may be some compatibility issue with the “other brand “ magazi, but sometimes my 2011 locks back on some magazines and not on others.
What cut / notch causes the pistol to lock back, or is it something else?

Does this only happen with some magazines?
Is it repeatable with those magazines or even intermittent but still just certain magazines?

If so, it could be a weak spring in the magazine or the tab on the follower is not engaging the slide stop correctly.

 

[craigntx]

My brand new wiley clapp did that with arguably the best mags (tripp cobra).
Its something nobody can explain. Like why mexicans wear t shirts in the pool

 

[WAA]

Welcome to The 1911 Game, my man.

Enjoy.

 

[oldag]

Failure to lock back is most often (not always) a mag issue.

 

[TexMex247]

I see it every once a while with low powered ammo. A heavy recoil spring with weak ammo could be the culprit.

 

[Coon]

Did you figure it out yet? If so, what was the problem? Inquiring minds want to know!

 

[orbitup]

You sure you're not riding the slide stop with your thumb?

I have a habit of doing this so on a couple of guns so I've installed aftermarket slide releases that move it out of the way enough.