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Old 03-01-2015, 08:43   #1
attrapereves
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Glock 20 gen4

Is the Glock 20 gen4 good to go? I remember reading some things here a while about about failures to feed, etc
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Old 03-01-2015, 15:33   #2
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Yes gtg
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Old 03-01-2015, 16:04   #3
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Yep....GTG

Mine has been functioning flawlessly with all ranges of ammo.



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Old 03-07-2015, 20:44   #4
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A friend of mine bought one earlier this year and its been great.
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Old 03-07-2015, 21:15   #5
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Is it GTG? If you shoot FBI load power ammo, yeah, it's as GTG as a Gen3/Gen3SF. If you shoot full power on up, if you get one that doesn't have FTF issues, sure, it's GTG. If you get one that has FTF issues, then Glock's fix for that is to give you (after you spend $$ shipping the pistol back to them Next Day Air) a Gen3/Gen3SF - but only if you be a pain and demand that. If you don't demand that and trust Glock to fix it, they will send your FTF Gen4 back to you pronouncing it Glock Perfection.

Unfortunately that's the state of Gen4 G20 right now...

Last edited by chucky2; 03-07-2015 at 21:21..
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Old 03-07-2015, 21:26   #6
attrapereves
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Sounds like I might just need to go with a gen3 then.

Any idea why the gen4 has FTFs?
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Old 03-07-2015, 21:29   #7
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I'veshot 200gr and some 180's through mine very accurateand no problems and so time will tell.
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Old 03-08-2015, 01:01   #8
chucky2
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Originally Posted by attrapereves View Post
Sounds like I might just need to go with a gen3 then.

Any idea why the gen4 has FTFs?
There are theories but since no one, other than Glock, has many FTF Gen4 G20's, a lot of full power and on up ammo, and high speed cameras, it's anyone's guess as to what the reason(s) are for some Gen4 G20's FTF. The problem is, if you're one that is planning to shoot full power and up in a Gen4 G20, there is no way to know what you'll get: A Glock Perfection Gen4 G20 or a Glock "Perfection" Gen4 G20.

If you are planning to shoot full power and on up and need the best chance of reliability, Gen4 G20 isn't it - Gen3/Gen3SF is. Hopefully at some point Glock will correct that, but, who knows when - if ever - that will happen...
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Old 03-08-2015, 05:28   #9
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If you want to spend the money, try extra power magazine springs. If that doesn't stop the ftf's then try two stock magazine springs meshed together and put back in the magazine, you lose one or two rounds of capacity with doubled mag springs but, from my experience, it will stop the ftf's. I had to deal with this problem when I converted my G21 to fire .460 Rowland (185gr @ 1500fps).

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Old 03-08-2015, 05:45   #10
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I have found that if you relax your wrist too much with a Gen 4 you can get a FTF.

Keep a tight grip (wrist) and not an issue.

Also, I have the Gen 4 24 pound RSA from Glockmeister. This has been flawess with full power Underwood Ammo.
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Old 03-08-2015, 07:02   #11
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New Gen 3 20sf here .....
Not one issue or hiccup at 1000 rounds of Underwood.

Havent tried anything over 200 grains yet.
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Old 03-08-2015, 12:50   #12
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Quote:
Originally Posted by attrapereves View Post
Sounds like I might just need to go with a gen3 then.

Any idea why the gen4 has FTFs?
Go with what you want. I wouldn't hesitate to purchasing a G4. The problems are far and few...as with any gun...with not a lot of commonality.........often times, the interweb magnifies the concerns of the few.



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Old 03-15-2015, 15:04   #13
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I was shooting my Gen 4 20 10mm today and had some FTFs after the 1st shot. I was running 175gr. truncated cone home cast bullets with 11gr. of Blue Dot behind them. This a top end load.
I have a 22lb. non captured ISMI recoil spring and stainless steel guide rod. I may need to get some extra power magazine springs or do some double mag. springs like on my .460 Rowland G21SF Gen 3.
I was thinking of getting the heavy tungsten guide captured guide rod with a 22lb. ISMI spring on it from the Glock Store. Maybe that would help with the extra weight? I'm using the Gen 4 recoil spring adapter so I can use the Gen 3 type of rsa on there.
The non captured setup is an real pain to take off the slide and put on. Maybe the heavier tungsten guide rod will slow the slide down along with 22lb. spring on there already. I'm using a KKM 6" barrel on the gun as well.

Last edited by 21Glock; 03-15-2015 at 15:25..
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Old 03-15-2015, 18:42   #14
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Maybe the heavier tungsten guide rod will slow the slide down along with 22lb. spring on there already.
I doubt it will slow the slide down. If it moved with the slide adding more moving weight, it might.

It should help a little with muzzle rise having more front end weight.
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Old 03-16-2015, 14:32   #15
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Quote:
Originally Posted by redbaron007 View Post
Go with what you want. I wouldn't hesitate to purchasing a G4. The problems are far and few...as with any gun...with not a lot of commonality.........often times, the interweb magnifies the concerns of the few.



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+1 . Have a new Gen4 G20. After 500 full power loads not
1 issue. GREAT GUN. Better recoil than my 20sf Gen 3. Prefer the new grips over the 20sf. Love the weapon! My EDC.
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Old 03-16-2015, 14:40   #16
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Quote:
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I doubt it will slow the slide down. If it moved with the slide adding more moving weight, it might.

It should help a little with muzzle rise having more front end weight.
Mods may be causing FTF. The new RSA works fine for me with my full house power loads. New Starline Brass 165gr Rem GS 10.0gr Power Pistol CCI 350 LPM 1395 ft/sec 712 ft/lbs energy.
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Old 03-16-2015, 17:59   #17
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Quote:
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Mods may be causing FTF. The new RSA works fine for me with my full house power loads. New Starline Brass 165gr Rem GS 10.0gr Power Pistol CCI 350 LPM 1395 ft/sec 712 ft/lbs energy.
I agree that the mods may be causing FTF. I do not agree that a tungsten guide rod will slow the slide down.
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Old 03-16-2015, 19:51   #18
redbaron007
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Quote:
Originally Posted by 21Glock View Post
I was shooting my Gen 4 20 10mm today and had some FTFs after the 1st shot. I was running 175gr. truncated cone home cast bullets with 11gr. of Blue Dot behind them. This a top end load.
I have a 22lb. non captured ISMI recoil spring and stainless steel guide rod. I may need to get some extra power magazine springs or do some double mag. springs like on my .460 Rowland G21SF Gen 3.
I was thinking of getting the heavy tungsten guide captured guide rod with a 22lb. ISMI spring on it from the Glock Store. Maybe that would help with the extra weight? I'm using the Gen 4 recoil spring adapter so I can use the Gen 3 type of rsa on there.
The non captured setup is an real pain to take off the slide and put on. Maybe the heavier tungsten guide rod will slow the slide down along with 22lb. spring on there already. I'm using a KKM 6" barrel on the gun as well.
Are you using the G4 RSA or the G3 RSA with the adapter?



red
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Old 03-17-2015, 20:48   #19
21Glock
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I am using the G3 with RSA adapter. I think the more I read everywhere, I need to go back to the G4 RSA that came with the gun. That's what this G4 20 was designed for after all.

I may go back to the stock barrel as well. Since I reload and I don't want any smiley's, I may just use my 6" KKM barrel only for the hottest loads.

As they say, why mess with Glock Perfection.
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Old 03-17-2015, 20:50   #20
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Just curious, are you using the stock barrel and are you getting smiley's with this load on your 10mm brass?
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