I believe the G19 spring is the same for Gen 4 and Gen5, so a reduced rate Gen 4 spring should work in a Gen 5 gun.

I would check the usual after market guys if you need reduced rate RSA for a Gen 5 G17.

 

Taran Tactical

 

Why do this? Sorry for my ignorance. Is this for your EDC? Aside from the functionality standpoint shouldn't you be concerned about liability as well? Please help me understand.

 

You would go lighter if your chosen ammo is too light a load to successfully cycle the gun.

Are you worried about getting sued for using a lighter recoil spring?

 

G19 Gen4 RSA is marked 0-4-3, part number 8703.
G19 Gen5, G19X RSA is marked 1-7, part number 39310.

There have been threads on G19 Gen4 and Gen5 RSA:

https://www.glocktalk.com/threads/gen-4-5-recoil-spring-assembly.1683325/

There is another recent thread I'm unable to find that has a photo showing definite visible differences between the two RSAs.

Those who have contacted Glock CS asking what is different have reported several varying statements about identical or "slightly" different spring wejghts without any further details.

Currently, the Gen5 version of a pistol uses a RSA that is different from Gen4 EXCEPT the G26. The reason is obvious for the Gen5 G17 and G34 (change in barrel lock-up requires longer RSA), but the G19 reasons remain very unclear to us unenlightened.

FYI: RSA INFORMATION

The Glock Certified Armorer's Parts List is the best source for current RSA information:

https://us.glock.com/documents/FRM-72-26.xls

Captive Dual-Spring RSA units are labeled on the heel with a number that is read LEFT-RIGHT-DOWN.

The LEFT-RIGHT digits identify the models which use that RSA, as shown below.

The DOWN digit shows the part revision number for that RSA and will only be present after the first revision.

The DOWN digit numbers shown below are the latest known (to me) revision.

0-1-4 -> G22, G31, G35, and G37 Gen4
0-2-4 -> G17 and G34 Gen4
0-3-3 -> G23 and G32 Gen4
0-4-3 -> G19 Gen4
0-5-2 -> G17T Gen4
0-6--- -> G19T Gen4 (prototype or limited run)
0-7-2 -> G20 and G21 Gen4, G40, G41
0-8-2 -> G26 (including Gen5), G27, G33, G39
0-9-1 -> G29, G30, G36
1-0--- -> G42
1-1--- -> G43
1-2--- ->
1-3--- -> G17 and G34 Gen5
1-4--- ->
1-5--- ->
1-6--- ->
1-7--- -> G19 Gen5, G19X (possibly should have been 1-2)

I have no info on the dual-spring RSA used by the G28.

 

If you are going to use your pistol for self-defense I would LITFA. Range toy only use, who cares.

 

Here is Glockmeister's offerings, I found when looking.

http://www.glockmeister.com/Single-Spring-Assemblies/products/631/

 

Lone Wolf Distr. makes a little adapter insert for the slideto convert the slide for allowing smaller Gen 3 guide rods/springs; they work fine so plugged.

https://www.lonewolfdist.com/Detail.aspx?PROD=756358

So plugged, you can then use Wolff's guide rods and plethora of lighter conventional single recoil springs, etc...

 

If you go too light it may have trouble locking up the barrel sometimes and you may have reliability problems. A lighter spring is like shooting a Gen 4 with a worn out recoil spring. The best option is a Gen 3 steel guide rod and Gen 3 recoil spring with a lone wolf adapter. This setup converts your Gen 4 or Gen 5 into a Gen 3 recoil system. I use this system on my Gen 4 G34 because I do like the simplicity of the Gen 3 recoil spring system. I have found it reduces brass to the face and is more reliable with weaker ammo. But results may vary, can’t guarantee this will be the case with every gun.