Glock platform designed around 9mm

CUJOHUNTER · Jan 23, 2015

I've heard this before and read it on different sites.
The notion is that the existing Glock platform other than .45acp models was originally designed and concieved around the 9mm caliber. Of course, the first Glock model (G17) is a 9mm, but does that mean that .40S&W and .357SIG models basically borrowed the 9mm platform and just bored out the slides to accommodate their respective barrels? If so, what does that mean, if anything at all?
Can anyone shed some light on this?

Jack · Jan 23, 2015

http://www.glockmeister.com/Stripped-Receivers/products/107/

Notice anything?

CUJOHUNTER · Jan 23, 2015

Nothing at all..... which is what I always thought.

Jack · Jan 23, 2015

This is a Generation 3 frame. We do not currently offer Generation 4 frames.

This is a GLOCK OEM empty frame. PARTS ARE NOT INCLUDED WITH THIS ITEM. This frame is for use with 9mm, 40 S&W, 357 SIG, & 45 GAP slides.

The frames are all the same, with the exception of the 45 and 10mm.

Hattrick 22 · Jan 23, 2015

Thanks for sharing that's something I have never known. So are the Gen 4 frames caliber specific?

Jack · Jan 23, 2015

I don't believe so.

Rainsdrops · Jan 24, 2015

It means the original 9mm frame was over engineered.

Jack · Jan 24, 2015

Rainsdrops said:
It means the original 9mm frame was over engineered.

They went from 2 pin to 3 pin frames with the advent of the 40.

jdindadell · Jan 28, 2015

Rainsdrops said:
It means the original 9mm frame was over engineered.

Or 40, 357sig and 45gap are not "quantum leaps" above 9mm in respect to frame strength requirements.

Rainsdrops · Jan 30, 2015

if you reed saami pressures 9mm, 40, & 357 sig are all around 35K cup. if you look at cartridge design, the heavier bullet of the 40, requires more force, to move it through the barrel & the bottleneck case of the .357 sig increases gas velocity. more force, more velocity will have a greater impact on the frame.

JBP55 · Jan 30, 2015

Using defensive ammunition the energy at the muzzle of the .40 and .45 GAP is usually within 10% of the 9mm.
When you compare the defensive ammunition of .357 Sig to the 9mm the energy level rises approximately 25%.

JadeRaven · Jan 30, 2015

Already the G36 is .45cal and just 28mm wide. The G41 is lighter than the G21. I would imagine it's only a matter of time before they start slimming down the entire .45 lineup.

jdindadell · Jan 30, 2015

I was referencing the frame strength requirements, not necessarily the power out the barrel of the various calibers.

Given that the glock is a locked breech gun, the force exerted by firing has to drive the mass of the slide/barrel assembly backwards, against the recoil spring pressure. Once that operation is underway the barrel does contact the locking block and force is exerted through that block into the frame. Not sure if glock measured this force in the design phase (I can imagine they do) but I am sure there is a balancing act with the other masses and spring weights depending on caliber.

A 3rd pin was introduced to the locking block (2nd really, the 3rd pin is the trigger pivot) when the G22 was released, likely due to need of extra support for the locking block. The force is not really taken by the pins alone, as the block does drop into a slot in the frame and the sides of that slot will likely take the bulk of the force as that force is exerted backwards.

Rainsdrops · Jan 31, 2015

I also was reference frame strength. Equal and opposite reactions. Greater force out of the barrel, is also more force against the locked breech. The 9mm glock frames handles, this increase with no problems. Seems as though they are over built. (also h&k USp). A blue moon ago I read an article on glock's FEA testing. Pretty interesting

Jack · Jan 31, 2015

Rainsdrops said:
I also was reference frame strength. Equal and opposite reactions. Greater force out of the barrel, is also more force against the locked breech. The 9mm glock frames handles, this increase with no problems. Seems as though they are over built. (also h&k USp). A blue moon ago I read an article on glock's FEA testing. Pretty interesting

I would assume they were designed to fire 9mm NATO which is basically a +p round. Muzzle energy from ammo on the higher side of the spec should have as much muzzle energy a lot of the 40 or 357 sig loadings.

LACamper · Jan 31, 2015

What I always thought was interesting is that the older Ruger .45 autos were designed around the 10mm.

Glock platform designed around 9mm

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