Glock 21 Gen 4
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Thread: Glock 21 Gen 4

  1. #1
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    Glock 21 Gen 4

    Hi guys!

    A little help please?

    I'm new to glocks but not really new to guns because my dad was in the military so I grew up with the 1911's. I never really wanted to personally own a gun until now that I have my own family. After this pandemic, my first order of business is getting myself a glock 21 gen 4 which is basically for home defense purpose.

    I keep my stuffs simple, reliable and durable so I'll go with that principle with my glock. I only plan to upgrade to steel night sights, tungsten RSA and a minimalist magwell. I'll try to keep everything OEM as much as I can. I'm also sticking to the stock spring loads.

    Any other suggestions for replacements/upgrades would be much appreciated.

    With that, my only concerns are:
    1. metal to polymer rubbing in the frame (RSA side)
    2. Polymer proper maintenance. Prolong the frame lifetime.

    Much thanks guys!
    Last edited by RBSkullLeader21; 05-04-2020 at 10:07 PM.

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    The absolute most reliable Glock is a stock configuration. It will handle the largest variety of ammo consistently using the factory parts.

    Knowing that, my recommendation is skip the tungsten guide rod and stay with the factory guide rod. Those modifications are for gaming guns anyways. For self defense, keep it stock.

    Go with whatever sights you like, the Glock night sights are a great deal you might want to consider. The magwell wonít change any core function so thatís not an issue if you can find one for the Gen4 21.

    Thereís absolutely nothing you need to do to the polymer. As long as you donít set it on fire or dunk it in acid it will last forever. Unlike the 1911 and any older gun, Glocks require very little maintenance - brush the dirt off and just a few drops of oil to keep it running forever.

    The most important thing you can do is change the springs regularly. Springs keep the gun functioning and protect it from physical damage. Glock keeps the prices low as well so thereís never an excuse to not keep them fresh.

    Being new to Glocks, the trigger is a much longer pull than a 1911. Itís a completely different mechanism so plan on lots of practice to eliminate the low left shots that are common for those shooting Glocks for the first time. Again, stick with a stock setup and master it.

    This is a great group to ask questions of.


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    Oh, you also asked about metal to polymer rubbing- a non issue. Glock keeps metal
    parts on metal parts and plastic on plastic, so you donít get metal rubbing plastic.


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    Very informative. Appreciate it. Thank you. I'll skip the tungsten then.

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    Ditto, on the tungsten guide rod. I shoot two Gen3 G21s. Can't imagine why you'd want a heavier guide rod. I do use steel guide rods, when I'm matching spring weights to loads I'm shooting.

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    Hi!

    I was concerned about the recoil & muzzle flip and some glock owners suggested this heavier tungsten guide rod. My major issue before was durability with the stock polymer rods that's why I considered this. I know load compensation is in the spring and has nothing to do with the rods. I figured if I will change the rods to metal, might as well fix the muzzle flip (if indeed unmanageable). A steel rod is also an option for me. Less cheaper too. Anyway, I'd test the polymer first then I decide later whether to go metal.

    Much thanks for the input.

    I read some blogs regarding rubbing/scraping of the guide rods in that part of the frame. Any truth to this? Any way I can somehow eliminate the lateral play of the guide rod (if this really is happening)?

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    Hi guys!

    Any thoughts on this DPM Mechanical Recoil System Captured Version for G20/21/40/41 Gen4?

    Name:  CAPTURED-GLOCK-GEN-4-20-21-40-41PACKING.jpg
Views: 82
Size:  141.7 KB

    Much thanks.

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    Glock 21 Gen 4

    There isnít any lateral play with the guide rod. If someone placed the rod incorrectly on the slide/barrel when reassembling the gun they could scratch the frame (Gen4 only) but this doesnít cause any real damage.

    I do have one of the DPM systems for standard frame guns (17, 22, 37). The difference is minimal, itís basically the same difference as going from a Gen3 (single spring system) to a Gen4 (dual spring). You are already planing on a Gen4 so I donít think you would see much difference but I am saying that not having tested a G21 with it.

    If you really want to enjoy a 21. Check out an older 21c. I picked one up thinking I would keep it as a collectors item but I made the mistake of shooting it. Iím totally hooked! Itís an amazing difference!!! Iím now looking for a cheap G37 (45Gap) to convert to a 37c. It fits my hand better than the 21. I am planning to test out the DPM I have in that gun since it will be a Gen3.


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    Last edited by MtStream; 05-06-2020 at 11:51 PM.
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    Hi!

    Again, appreciate the inputs.

    Like I said, I'll test the stock RSA first. If I'm not satisfied, then I'll upgrade but only the rods. Spring tension will be stock. Btw, the RSA is the only internal modification I'd like to do (if ever I decide on going for an upgrade). FTF/FTE won't be an issue with my planned set up, right? I also don't intend on using multiple types of ammo (exclusive FMJs). No optics, lights or lasers for me too. My glock will be for home defense only. Maybe 4 or 5 trips to the range yearly and that's it for me.

    As for the G21C, I am not into those ported barrels and slides. It's just too fancy for me. No offense. As long as my glock will fire when I need it to and maybe outlast me, that's all I care about.

    Much thanks.

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    No offense taken, I wouldnít recommend a c model for home defense over a standard. But if you ever do get a chance to shoot one, be careful, you might have to own a fun gun in addition to the home defense gun.

    As far as risk of failure from changing the guide rod - itís your personal defense gun, you need to shoot it a lot and you need to train a lot. With enough experience putting rounds down range you will know if your setup is reliable or not. It should be fine, but never assume, put rounds down range to confirm it.


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