Gen 4 G21 Magazine Issue

[csheehy]

All,

Had an officer suffer two instances of auto-disassembly of his magazines in the last couple of weeks. Guns are approx 4 years old. In both instances, the magazine was seated in the pistol & pistol holstered when
the baseplate let go. I haven't seen the first magazine, but do have the pieces of the second. The flat plate with the post on it that the mag spring nests in and then goes against the outer baseplate is cracked
along one long edge.

In examining several officers' magazines, they all exhibit to a greater or lesser degree, an outward curve on the base plate, or a slight bulge

Anyone heard of/experienced anything like this?

Thanks in advance.

Chris

[HCM]

All,

Had an officer suffer two instances of auto-disassembly of his magazines in the last couple of weeks. Guns are approx 4 years old. In both instances, the magazine was seated in the pistol & pistol holstered when
the baseplate let go. I haven't seen the first magazine, but do have the pieces of the second. The flat plate with the post on it that the mag spring nests in and then goes against the outer baseplate is cracked
along one long edge.

In examining several officers' magazines, they all exhibit to a greater or lesser degree, an outward curve on the base plate, or a slight bulge

Anyone heard of/experienced anything like this?

Thanks in advance.

Chris

Only with the newer 17/19 mags and the factory plus 2 base plate.

[ST911]

The flat plate with the post on it that the mag spring nests in and then goes against the outer baseplate is cracked along one long edge.
...
In examining several officers' magazines, they all exhibit to a greater or lesser degree, an outward curve on the base plate, or a slight bulge.

Slight bowing of the magazine base plate can be found in many, esp fully or over-loaded mags that have been in service awhile.
Less frequently, you may also find a slight bulge at the bottom of the rear wall of the mag body in mags that have been around awhile.
Spontaneous disassembly usually linked to improper mag disassembly procedures. Purpose built or improvised clamps, tools, fixtures, etc. Look for tool marks.
On occasion, some might reduce or remove the base plate retention tabs on the mag body to make disassembly easier.

All of the above are minimized with right mag, right spring, right base plate, right training, right PM, right discipline. Rotating mags every few years is ideal, but is more practical for some than others.

You should also staff this with the Glock LE rep for your region.

[JonInWA]

How often had the faulty magazines been disassembled prior to the issues experienced? Glock recommends against too frequent/unnecessary/heavy-handed magazine disassembly, as it can create wear on the retention tabs. Best, Jon

[csheehy]

ST911--will definitely be speaking to Glock.

JonInWa--I doubt either had ever been broken down before.

Thank you all for the replies.

CJS