I had an idea. After reading many threads on the Gen 4 and especially after Mr. Vicker’s status report thread I think it would be a good idea to make a chart with pictures of the different springs and slides of the G4 series from Glock. If it were done and made a sticky it might cut down on some of the confusion and questions being asked so many times.
That would help me tremendously. I’ve been out of the Glock game for two years and don’t what revisions were made. All these numbered springs and slide revisions are giving me a slight headache. It’s nothing I can’t spend an hour or two researching but having it all on one page would help.
With my compliments to fellow member CoolBreeze, who sent me this, here you are gents:
PS, according to him, this came directly from Glock tech support.
GLOCK RECOIL SPRING ASSEMBLY (RSA) PART NUMBERS FOR GEN4 PISTOLS
11-20-10 - Glock now offers 6 different Gen4 RSAs for our Gen4 pistols
1st Model Gen4 G17 (still current & in production now, on into 2011)
· SP 08692 – RSA for “Variant 1” Gen4 17 with flat-back slide-nose-ring.
· Use in Gen4 G17 pistols serial # prefixes “PFB, PMN, PMP, PMR, PMS, PPM, PPP, PPR, PPS”, etc.
· For all Gen 4 G17 serial # prefixes prior to but not including “PUN”.
· SP 08692 is marked on the rear flange: “0 2 1”
2nd Model Gen4 G17 (when avaiilable),& all Gen4 G34
· SP 08284 – RSA for “Variant 2” Gen4 G17 & G34 that have a “chamfer” or “counterbore” around the
nose-ring-hole inside the slide (like a G26 or G27).
· Use in Gen4 G17 pistols with serial # prefix “PUN” & later, & all Gen4 G34 pistols.
· NOTE: One small batch of serial # prefix “PUN” Gen4 G17 pistols was run for the commercial market (not
LE), to test the new SP 08284 RSA for Gen4 G17 & Gen4 G34 pistols.
· “Variant 2” Gen4 G17 pistols are not currently in production as of 1120-18-10.
· Do NOT use the SP 08284 in Gen4 G17 pistols with serial #s prior to “PUN”.
· SP 08284 is marked on the rear flange: “0 2”
1st model Gen4 G22 & Gen4 G37
· SP 08694 – RSA for “Variant 1” Gen4 22 & Gen4 G37 with flat-back slide-nose-ring.
· Use in Gen4 G22 & Gen4 G37 with serial # prefix “PCG” & other serial # prefixes prior to “PUN”.
· SP 08694 is marked on the rear flange: “0 1 1”
2nd model Gen4 G22 & Gen4 G37, & all Gen4 G31 & Gen4 G35 models.
· SP 07577 – RSA for “Variant 2” Gen4 G22 & Gen4 G37 pistols that have a “chamfer” or “counterbore”
around the nose-ring-hole inside the slide (like a G26 or G27), & all Gen4 G31
& Gen4 G35.
· Use in Gen4 G22 & Gen4 G37 with serial # prefix PUN & later, & all Gen4 G31 & Gen4 G35 models.
· Do NOT use the SP 07577 in Gen4 G22 & Gen4 G37 pistols with serial #s prior to “PUN”.
· SP 07577 is marked on the rear flange: - “0 1”
ALL Gen4 G19
· SP 08703 – RSA for all Gen4 G19 pistols.
· Standard on all G19s beginning with serial # prefix “RCY” on 11-03-10.
· Available as Spare Parts about 11-20-10.
· SP 08703 is marked on the rear flange: “0 4”
Thanks Alpha that is great info!! I think it should be a sticky and updated as other springs if/when they become available.
What about this:
Seen this in GT forums.
It was covered above:
1st Model Gen4 G17 (still current & in production now, on into 2011)
[snip]
· SP 08692 is marked on the rear flange: “0 2 1”
1st Model Gen4 G17 (still current & in production now, on into 2011)
· SP 08692 – RSA for “Variant 1” Gen4 17 with flat-back slide-nose-ring.
· Use in Gen4 G17 pistols serial # prefixes “PFB, PMN, PMP, PMR, PMS, PPM, PPP, PPR, PPS”, etc.
· For all Gen 4 G17 serial # prefixes prior to but not including “PUN”.
· SP 08692 is marked on the rear flange: “0 2 1”
2nd Model Gen4 G17 (when avaiilable),& all Gen4 G34
· SP 08284 – RSA for “Variant 2” Gen4 G17 & G34 that have a “chamfer” or “counterbore” around the
nose-ring-hole inside the slide (like a G26 or G27).
· Use in Gen4 G17 pistols with serial # prefix “PUN” & later, & all Gen4 G34 pistols.
· NOTE: One small batch of serial # prefix “PUN” Gen4 G17 pistols was run for the commercial market (not
LE), to test the new SP 08284 RSA for Gen4 G17 & Gen4 G34 pistols.
· “Variant 2” Gen4 G17 pistols are not currently in production as of 1120-18-10.
· Do NOT use the SP 08284 in Gen4 G17 pistols with serial #s prior to “PUN”.
· SP 08284 is marked on the rear flange: “0 2”
Well, that’s clear as mud. My Gen4 17 is a PFE prefix (“variant 1”) with a flat “nose-ring-hole” (no counterbore) and shipped with an unmarked recoil spring assembly that caused feeding issues. When I called Glock, they specifically asked me if the slide was “flat or beveled” and promptly sent me two “0-2” marked RSAs which, according to the information provided, aren’t to be used with my 17. 
They seem to run fine, but with only a couple hundred rounds through the gun, that’s hardly indicative of anything. Also, on disassembly, it either falls out or requires a crowbar to remove (with very little in-between). I assume this is the reason for the metal cap on the “0-2-1” assembly.
I’d be very interested in why the “0-2” assembly isn’t supposed to be used with guns that don’t have a counterbored slide since that’s what I’m currently doing.
Good info, nice to have it consolidated. As an aside, this is why Im sticking with the Gen 3s, I moved away from 1911s because of this very reason (need spring x with this, but if you use xy then you have to switch to z which will affect x again):fie:
But it all goes toward general knowledge, I had no idea there were so many factory options. Thanks for the roll up.
For your information, I have a G17 serial # starting with PW and it comes with the beveled slide and the “0 2” RSA.
I understand “0 2 1” RSA is a backup solution for the 1st variant. Am I right?
Well, the previous option was one spring for too many models. With all that entailed…
TANSTAAFL
It is a running change to fix both the issues of the original and 02 springs on pistols with the non-counterbored, original slide design.
I am in the same boat as you.
The original, unmarked spring is both too stiff and gets hung up on the guide rod hole. That’s what it did on mine.
Based on the chronology that I’ve been able to figure, the 02 spring was designed as a replacement for the original spring. It has a lighter rate than the unmarked spring to fix the FTEs that were plaging the 17 Gen 4. However the design of the front of the spring is identical between the unmarked and 02 spring, meaning that the 02 spring still gets hung up in the slide when taking down the pistol.
Evidently, Glock took a two-step approach to fix the spring jam issue: they added a counterbore to the inside of the guide rod hole to give the 02 spring a place to rest without getting stuck on the ID of the hole and made that “variant 2” of the G17 design. Then, to fix the variant 1 stuck spring issue, they designed the 021 spring with the metal cup at the front to keep the tip of the coils out of the guide rod hole and not have to recall the slides to be counterbored.
IMO, they should have just replaced the 02 and original springs with the 021, left the slide’s guide rod hole alone, and everything would work.
Bottom line, if you have a non-counterbored guide rod hole in your Gen4 G17, you need the 021 spring. If you do have a counterbored guide rod hole, then you need the 02.
Personally, the 02 spring fixed my G17’s rare FTEs but still was a PITA to remove off the gun. So I started running a Glockmeister replacement spring. As soon as I became aware of the 021 spring, I called Glock to order one and I am waiting for it.
As soon as I receive it, I will wring it out at the range and if it works as advertised and proves itself function-wise, it will stay in the gun and the Glockmeister spring will just be a spare.
That metal cup at the tip of the spring assembly is what Glock should have done in the first place. That would have prevented all the spring stuck/lockup issues. On top of that, they should have provided that spring assembly with spring rates optimized for each caliber.
If those two common-sense items had been done from the start, the Gen 4s would have come out of the gate with the same reliability as every other Glock before it.
Glock sure created a configuration management nightmare for themselves with the Gen4…
Which is ironic since that’s exactly what they were trying to avoid with a single recoil spring assembly.
Anybody got a pic of the counterbore?
Original Gen4 slide on the left, counterbored Gen 4 slide on the right
I am replacing the OEM G22 Gen 4 spring with the Glockmeister setup after hearing of broken springs in earlier production (no counterbore) G22s. I had no functioning problems but the idea of a spring breaking when you need the gun most is very scary.
So is “Variant 2” configuration the one they are going to continue producing?
Evidently, based on the wording of that letter.
G17 Variant 2: counterbored slide + 02 spring.
G22 variant 2: counterbored slide + 01 spring.