Okay still thinking about a Glock 20

[cwall64]

The 22 lb spring is a common one. I'd recommend that.

Is there any one brand that stands out?  Seems that several options out there...  Mine is a Gen4.

[Dave84]

I have the Gen 3. Using the Glockstore Stainless Steel competition guide rod in mine.
I just looked all over and couldn't find heavier weight springs for the Gen 4. I know many of our members use the Gen. 4 Recoil Conversion Kit and then some form of heavy weight spring. I believe Wolff is very popular. Hope this helps. Guys with Gen 4s feel free to chime in here.

[ShadeTreeVTX]

You might want to look at this 10mm. G40 Hunter looks like a 6" barrel when compared to the G41 45 at the bottom.

http://imgur.com/a/B9Anl

Doug

[redbaron007]

The RSA for the G4 is limited as of right now. I think you can get a 24lbs for a G4 G20, but not sure of the other options.

Have you shot your G4 with some hot ammo? If so, have you had any issues? If not, why are you wanting to switch out your RSA?

I have a G4, manufactured in 1/2014, I have had no issues in shooting a wide range in ammo, including UW and BB; subsequently, I am not looking to switch mine out yet.

[Shane668]

I think Glock answered your question with the new Glock model 40. I built mine on a G20sf and used a lonewolf 6.62" threaded barrel with a 24lb recoil spring. It's digested the hottest loads imaginable. Most people in this forum will agree with hot loads you'll need a heavy recoil spring and the more mass (i.e. longslide) you can add the better off you'll be.