Anyone running Gen 3 guide rods and recoil springs in Gen 4 21s yet? [Archive] - Glock Talk

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21Glock
06-26-2012, 05:21
Hey guys,
I have a Gen 3 21SF that I have set up with an ISMI 22lb. recoil spring and ss non-captured guide rod, and LW 6" non-ported barrel to be able to shoot .45 Super rounds.
I just got a new Gen 4 20. I really like everything about the gun and was wanting to get a Gen 4 21 and set it up like my Gen 3 21SF to be able to handle .45 Super ammo.
I know I would have to get a Gen 4 adapter to fit into the front of the slide to be able to put Gen 3 type guide rods and recoil springs in the Gen 4 slide.

Has anyone tried the Gen 3 type guide rod and recoil springs in their Gen 21 yet and how does it work for you?

Thanks!

Firecop203
06-26-2012, 07:11
Would one of these work? Or would you still need an adapter?

http://www.glockmeister.com/Recoil-Assembly-G21-Gen-4/productinfo/G30077/

21Glock
06-26-2012, 08:41
Would one of these work? Or would you still need an adapter?

http://www.glockmeister.com/Recoil-Assembly-G21-Gen-4/productinfo/G30077/

Glock store sells a Gen 4 RSA adapter for about $10 that fits in the front of the Gen 4 slide to allow Gen 3 type steel guide rods and recoil springs to fit in the Gen 4 slides. I'm going to order one and try it out in my Gen 4 20 first and then in the Gen 4 21 that I'll get soon.

Firecop203
06-27-2012, 07:19
Glock store sells a Gen 4 RSA adapter for about $10 that fits in the front of the Gen 4 slide to allow Gen 3 type steel guide rods and recoil springs to fit in the Gen 4 slides. I'm going to order one and try it out in my Gen 4 20 first and then in the Gen 4 21 that I'll get soon.

Good luck, let us know how it turns out.

21Glock
06-30-2012, 13:07
I just got my Gen 4 RSA adapter in from the Glock Store. I tried it in my new Gen 4 Glock 20. It's a non-captured ss guide rod and a ISMI 22lb. recoil spring that I have in my Gen 3 21SF.
After much struggling with the spring, I managed to get it to fit in the barrel cut out and into the adapter.
So, the Gen 3 guide rods and springs fit into Gen 4 slides with this adapter. The new Gen 4 21 that I'll get soon will be set up to shoot .45 Supers just like the Gen 21SF.
Alright!!!

NoJoy
07-01-2012, 00:23
Do you trust the Gen 4 21 to shoot 45 Super completly stock? Will the duel recoil spring hold up to the additional pressures? If yes, that would be sweet indeed.

21Glock
07-01-2012, 13:43
Do you trust the Gen 4 21 to shoot 45 Super completly stock? Will the duel recoil spring hold up to the additional pressures? If yes, that would be sweet indeed.

That's why I got the Gen 4 RSA adapter. To be able to use the Gen 3 ss guide rod and the 22lb. recoil spring and the LW 6" barrel that I now have in my Gen 3 21SF in the Gen 4 21.
I don't intend to shoot the Gen 4 21 stock, when I get it in the next month or so, with a load as powerful as the .45 Super. No way shooting it stock with the .45 Super round.

NoJoy
07-01-2012, 18:02
Interesting. It's almost better just to stick with the Gen3 SF so that you can use the 22 or 24lb recoil spring/stainless guide rod-because the duel recoil spring of the Gen 4 won't keep up with the Super pressures.