New Phenomenon with Gen 4 G20

[nickE10mm]

FWIW, what you experiencing when reassembling is normal.  There are a few ways to get the slide to go on.  (in fact, I hadn't heard of the way you watched on youtube...)...

Method #1. While the slide is removed but assembled (and ready to go back onto the receiver ...), depress the firing pin safety plunger in and push the rear of the striker arm (the one that makes contact with the cruciform plate below during trigger operation) forward towards the muzzle of the firearm until the firing pin protrudes from the breech face, then reassemble as normal.

Method #2:  The trigger should be in it's rearward most position before removing the slide, locked safely back.  When the rear of the slide and rear of receiver are lined up (but otherwise "locked / stopped" so that reassembly is prevented (the condition you describe in your post above)... and WHILE continuing to put rearward pressure on the slide in an effort to 'fully' reassemble slide to receiver, use your third or fourth hand (lol) and push FORWARD on the trigger (which is locked in rearward position still) and the slide should 'click' in and successfully mate to the receiver.



Annnywayyys....  yes, what you experienced is normal for Gen4 firearms that have aftermarket triggers in them, it would seem.

[GunBugBit]

I'd love to say my G20 issues are entirely sorted out.  Seems the gun is suffering from a weakened mag catch spring.  Have to be careful when switching out mag catches not to flex that little rod spring so much that you put a bend in it -- very easy to do.  I ordered replacements.

[GunBugBit]

A new mag catch spring was the ticket. Perfect function last Saturday with 15+1 rounds of Underwood 150gr JHP at 1500 fps! In case anyone is wondering, I'm using a 24 lb recoil spring.

[sqlbullet]

Thanks for the feedback.  That is good news.  I always hate to hear about a Glock that is sick.

[The_Shadow]

A new mag catch spring was the ticket. Perfect function last Saturday with 15+1 rounds of Underwood 150gr JHP at 1500 fps! In case anyone is wondering, I'm using a 24 lb recoil spring.

If your G-20 is gen 4, what is the make of the recoil 24 lb spring setup???

[GunBugBit]

Good question and I am not good at remembering where I order all of my parts from.  With my 1911s, I can usually recall where I got my parts, but with Glocks and ARs, not so much.  I had to find  a company selling a kit including the little adapter for the forward slide hole.  If I come across where I ordered the rod/spring/adapter from, I'll post it here.  I think I got the spring from one company and the rod and adapter from another company.

At the risk of being incorrect, I'm going to say I got the spring from Wolff.  I will have to think harder or dig up where I got the rod and adapter.

[GunBugBit]

Thanks for the feedback.  That is good news.  I always hate to hear about a Glock that is sick.

Thanks!

[GunBugBit]

At the risk of being incorrect, I'm going to say I got the spring from Wolff.

One thing I can tell you, the spring is not flat coil but round coil.

Poking around just now, I see that Glockmeister sells a 24-lb flat coil captive spring on a steel rod.

http://www.glockmeister.com/Glockmeister-Stainless-Steel-Recoil-Spring-Assembly-for-Gen-4-20-21-40-41/productinfo/G4SS20CS/

I have a couple 22-lb versions of this but a 24 is what's in my gun right now.  Also have a 20-lb flat spring.

Still don't know for sure the source of my non-captive round coil setup.  The rod has a screw in the end so I can change out springs (a non-captive setup).  I'll take a pic of this if I think of it, a few might be interested.

I would go to lower spring weights if shooting the milder 10mm, but I want to shoot mainly Underwood and if 24-lbs is what works for those loads, I'll keep it in the gun.  Next session, I might see if the 22-lb works.

[4949shooter]

At the risk of being incorrect, I'm going to say I got the spring from Wolff.

One thing I can tell you, the spring is not flat coil but round coil.

Poking around just now, I see that Glockmeister sells a 24-lb flat coil captive spring on a steel rod.

http://www.glockmeister.com/Glockmeister-Stainless-Steel-Recoil-Spring-Assembly-for-Gen-4-20-21-40-41/productinfo/G4SS20CS/

I have a couple 22-lb versions of this but a 24 is what's in my gun right now.  Also have a 20-lb flat spring.

Still don't know for sure the source of my non-captive round coil setup.  The rod has a screw in the end so I can change out springs (a non-captive setup).  I'll take a pic of this if I think of it, a few might be interested.

I would go to lower spring weights if shooting the milder 10mm, but I want to shoot mainly Underwood and if 24-lbs is what works for those loads, I'll keep it in the gun.  Next session, I might see if the 22-lb works.

This is the spring I sometimes use in my Gen 4.

[GunBugBit]

Just really pleased that the G20 is now what I hoped it could be.

[The_Shadow]

Still don't know for sure the source of my non-captive round coil setup.  The rod has a screw in the end so I can change out springs (a non-captive setup).  I'll take a pic of this if I think of it, a few might be interested.

I would go to lower spring weights if shooting the milder 10mm, but I want to shoot mainly Underwood and if 24-lbs is what works for those loads, I'll keep it in the gun.  Next session, I might see if the 22-lb works.

If your rod has a screw then it makes it captive....  Non-Captive the spring or springs will slide off the recoil rod or rods without removal of any captive device...

My 20 SF is setup with the Wolff non captive recoil rod and 22lbs spring, also have the 20lbs and 24lbs springs.  I also like the fact that the non captive setup is holding the slide closed, requiring slightly more force to pull from battery.
If I am testing heavier loads, I will run the 24 lbs, however the 22lbs is working for the 10mm, 40S&W and 9x25 dillon loadings.