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G20 10mm. gen 3 vs. gen 4 ?

2.2K views 13 replies 13 participants last post by  sabre51  
#1 ·
I am looking at adding a 10mm G20.

I love the .40 caliber Glocks that I have and also loving on the gen 4 RSA vs. the gen 3 version of same. It may result in just buying a gen 4 or perhaps even building one from an 80% gen 3 frame I have. I've built 80% before in Glock and 1911 and they have all turned out to function feed and extract great and also have wonderful accuracy.

My use for the G20 will be somewhat limited with the probability of low round count through it annually. It will used more so for adventures in the areas where black bears and some grizzlies live. I would be shooting it enough to become familiar with it but again the annual round count would most likely be under 500 rounds. To build a 1911 in 10mm would take around 3 months for my schedule with all the fitting and polishing and blood donation while a Glock 20 could be put together in about 3-4 hours.

I will be running Underwood 200g through it almost exclusively and my own hot reloads that will produce velocities and pressures very similar to the Underwood rounds. I have other shooters that fill the needs for shooting a lot and I see the 10mm, for me, to be only a consumer of hot rounds.

If I could find a Glock 80% in a gen 4 large frame it would be an easy decision, but I'm not aware of those out there to be found. Most of those 80% are in gen 3.

QUESTION: Considering the intended ammo to be used would there be concerns between selecting a G20 in gen 3 vs, a gen 4 in this situation ???
 
#4 ·
A Gen 3 G-20 with frying pan finish is my bedside pistol. It feeds, fires and ejects whatever I put through it and it fits my hands perfectly. It has a steel guide rod and tritium sights installed but is otherwise stock.
I prefer the Gen 3 over the 4. But honestly you can’t go wrong with either.
Glock’s best gun in the best millimeter.
 
#14 ·
Bingo! It is much easier and cheaper to change recoil spring weights to tune it to your ammo choices, especially if you handload. I would post a picture of my Gen3 G20 with an aluminun scope rail mount and 4x Burris scope with a LW 9 inch barrel and the chest holster I carry it in, but I would burn this thread to the ground with all the comments about how I just created a jam-o-matic, etc, etc etc... Let me assure you it functions fine, and I can install and remove it easily. when out in the mtns. and it adds a whole new dimension of fun shooting this gun. I realize the dust cover flexes under recoil, and it won't win a damn thing at camp perry But it still shoots reasonably accurately at distance and is a LOT of fun! It fits in my Super Redhawk 454 casull shoulder holster and is much more fun to carry. I gotta believe Elmer is smiling from the range in heaven when he sees me carrying it...
 
#12 ·
I am looking at adding a 10mm G20.

I love the .40 caliber Glocks that I have and also loving on the gen 4 RSA vs. the gen 3 version of same. It may result in just buying a gen 4 or perhaps even building one from an 80% gen 3 frame I have. I've built 80% before in Glock and 1911 and they have all turned out to function feed and extract great and also have wonderful accuracy.

My use for the G20 will be somewhat limited with the probability of low round count through it annually. It will used more so for adventures in the areas where black bears and some grizzlies live. I would be shooting it enough to become familiar with it but again the annual round count would most likely be under 500 rounds. To build a 1911 in 10mm would take around 3 months for my schedule with all the fitting and polishing and blood donation while a Glock 20 could be put together in about 3-4 hours.

I will be running Underwood 200g through it almost exclusively and my own hot reloads that will produce velocities and pressures very similar to the Underwood rounds. I have other shooters that fill the needs for shooting a lot and I see the 10mm, for me, to be only a consumer of hot rounds.

If I could find a Glock 80% in a gen 4 large frame it would be an easy decision, but I'm not aware of those out there to be found. Most of those 80% are in gen 3.

QUESTION: Considering the intended ammo to be used would there be concerns between selecting a G20 in gen 3 vs, a gen 4 in this situation ???
Opening the nose of the Poly 80 gen 3 design to accept the larger diameter guide rod of the gen 4 is an easy process. I've done 2 of these for the Glock G20 slides. They work fine.