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glock 20

Firearm Model
The Glock 20, introduced in 1991, was developed for the then-growing law enforcement and security forces market for the 10mm Auto. The pistol will handle both full-power as well as reduced "FBI" loads that have reduced muzzle velocity. Due to the longer cartridge and higher pressures, the pistol is slightly larger than the Glock 17, having an approximately 2.5 mm (0.1 in) greater width and 7 mm (0.3 in) greater length. Though many small parts interchange with the Glock 17, with a close to 50% parts commonality, the major assemblies are scaled-up and do not interchange. The standard magazine capacity of the Glock 20 is 15 rounds. In 2009, Glock announced they would offer a 152 mm (6.0 in) barrel as a drop-in option.

The Glock 20SF is a version of the Glock 20 that utilizes the Short Frame (SF) which is based on the standard G20 frame (same width), but reduces the trigger reach from the back of the grip by 2.5 mm (0.098 in) and the heel of the pistol is shortened by 4 mm (0.16 in) so the trigger can be reached and operated better by users with relatively small hands.

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Recent contents
  1. S

    Glock 20 10mm & 21 .45 ACP Both are MOS Gen5s w/ Holosun SCS

      1. For Sale
    • $1234
    • Portland
    • Oregon
    $775 - Glock 20 10mm Lightly used - w/ Holosun SCS $600 - Glock 21 .45 ACP Unfired - SCS is traded and will NOT come with the Glock 21. If the Glock 20 is not sold but you still want an SCS, I can move that SCS to the G21 and then I'd sell it for $825 with the optic. Each will come with 2...
  2. Aero Denezol

    Walther PDP 2.0 5" Full Size Frame * Trade for low mileage Glock

      1. For Trade
    • $1
    • Salem
    • Oregon
    I am the original owner, purchased new in late 2022. This PDP has only 300 rounds of factory ammo fired, no reloads. Includes 3 factory mags, original case, optional backstraps, manual, and adjustment tool. Includes factory RMR plate for Holosun 407/507 (or similar). Absolutely nothing wrong...
  3. P

    G20 Mag and Taran Tactical Mag Extension

      1. For Sale
    • $15
    • Milwaukie
    • Oregon
    (1) Glock G20 magazine with X-grip for G29 (brand new) - $10 (1) Taran Tactical +2 Magazine Extension for 9mm Glock - $15
  4. Abigfatdynamo

    Glock 20 MOS gen 5 basically new

      1. For Sale
    • $500
    • Portland
    • Oregon
    Selling my Glock 20 MOS. Has about 50 rounds through it. Great gun just not really my bag. Comes with Talon pro grip, three mags, original manual and case. Will throw in 50 rounds of S&B. Looking for $500 firm. Cash only. Buyer pays transfer. Meet at an FFL in Portland/Beaverton.
  5. dmmv

    Sig Sauer Xten 10mm

      1. For Sale
    • $740
    • NW Portland
    • Oregon
    Hi all, selling a like new Sig Sauer Xten. Chambered in 10mm, this P320 FCU can be used in 320s from 9mm all the way up to 45. I believe it’s the only P320 FCU that can shoot every caliber (but I’m a Glock guy and not an expert on Sigs). Picked it up on trade from a very reputable NWFA member...
  6. idlepatience

    Glock 20 Gen 4 10mm

      1. For Sale
    • $475
    • Springfield
    • Oregon
    For sale is a Glock 20 Gen 4 10mm with a silver Lone Wolf barrel, hi viz night sights (not sure on brand), Talon grips, and 3 magazines. Also includes black OEM barrel if the Lone Wolf isn't your speed. I suspect this gun is bacially new in box and certainly has less than 50 rounds through it...
  7. E

    Gen 4 Glock 40 MOS for G20

      1. For Sale
      2. For Trade
    • $550
    • West Richland
    • Washington
    Hello, First time posting here. Moved to WA after getting out of the military and just set up my account here. I’ve got a Gen 4 Glock 40 MOS that I’m looking to sell or trade for a Gen 4 Glock 20. My G40 is in excellent condition, legitimately less than 100 rounds through the gun. All...
    • Classified Ad
    • Handgun Classifieds
    • Eliot
    • g20 g40 g40 10mm gen gen 4 gen 4 glock glock 20 glock 40 glock 40 mos trade trade for
    • Replies: 2
  8. B

    *Just lowered - $100 Need Sold!* Glock 20 Gen 4 w/ TLR-1 & Compatible Holster+Lonewolf .40 s&w conversion Barrel + 400 Rounds + 3 Mags

      1. For Sale
    • $650
    • Portland
    • Oregon
    Like the title says. BlackHawk Epoch level 3 Retention Holster is compatible with included Streamlight TLR-1. Includes Lonewolf .40 s&w Conversion barrel and over 200 rounds of 10mm ammunition and 200 rounds of .40 s&w. Fifty of 10mm rounds is Underwood ammunition - the most powerful ft/lb...
  9. L

    BNIB Glock20 10mm unfired

      1. For Sale
      2. For Trade
    • $570
    • Happy Valley
    • Oregon
    Brand new glock 20 gen4 10mm for sale. Unfired. Have box and everything it comes with. Backstraps, three mags, bore snake, lock, and paperwork. Let me know if you have any questions. Prefer to transfer at adaptive firing solutions in Oregon city.
    • Classified Ad
    • Handgun Classifieds
    • Luongj
    • gen 4 gen4 glock glock 10mm glock 20 glock 20 gen 4 glock20 glock20 gen4
    • Replies: 0
  10. washagonian

    Barrel for Glock 20 (10mm)

      1. For Sale
    • $75
    • Troutdale
    • Oregon
    If the ad is up, it's still for sale Glock 20 (10mm) Barrel - Aftermarket, Bright Stainless $75 I shot about 225 rounds of 10mm through this barrel in my Glock 21, but I sold the G21 so I no longer need this barrel. (Yes, I know a G21 is 45 ACP.) This is NOT a conversion barrel - it's a...
  11. trevi

    GLOCK GEN 4 20/21/40 frame

      1. For Sale
    • $200
    • Portland
    • Oregon
    For sale is a a NIB GLOCK GEN 4 large frame. Can be either used for G20, G21, or G40. Comes with the backstraps, not pictured. Has matching case that shows it left factory as a G40, however, i bought this as i am selling it.
    • Classified Ad
    • Handgun Classifieds
    • trevi
    • 10mm 45-acp gen gen 4 glock 20 glock 21 glock 40 glock gen 4
    • Replies: 4
  12. X

    WTT Glock G20 Gen4 10mm for G40 Gen4

      1. For Trade
    • Bellingham
    • Washington
    WTT MY Glock G20 Gen4 10mm for Your G40 Gen4 My G20 Gen4 is newish. Excellent Condition. Stock. ~200 rounds fired. Zero issues. Works awesome! Local Swap in Puget Sound area. Located in Bellingham. DM to discuss. Thanks!
  13. Huckleberry12

    Glock G20 gen4 10mm with trijicon HD Night Sights and custom frame work

      1. For Sale
    • $500
    • Washougal
    • Washington
    For sale is a used Glock G20 in 10mm. There’s been about 300 rounds through it. Upgrades: Trijicon HD night sights Grip reduction Silicone carbide grip coating It comes with x2 15 round magazines and the original hard case. I am asking $500 buyer pays transfer fee.
  14. Aero Denezol

    Ameriglo Trooper 3-Dot Tritium Night Sights for Glock 20/21 #GL-820 * New * Free Ship

      1. For Sale
    • $65
    • Salem
    • Oregon
    Model # GL-820. Brand new, rec'd in inventory less than a month ago. Never installed. Free ship in the PNW by USPS First Class. $65 Paypal F&F, VenMo, CashApp, Zelle, or Check/Money Order
  15. Aero Denezol

    Lone Wolf AlphaWolf 4.6" Barrel For M/20 Conversion to .40S&W Glock 20 AW-2040N * New in Box * Free Ship

      1. For Sale
    • $130
    • Salem
    • Oregon
    Brand new in box, unused. Drop in barrel converts Glock 20 from 10mm to 40 S&W. $130 shipped in the PNW by USPS First Class. Paypal F&F, VenMo, CashApp, Check, Money Order or Cash. If you prefer in-person sale M-F 7am-2pm at my business in South Salem. Members with established feedback only...
  16. Aero Denezol

    **SPF** 20 Gen 4 10mm * New in Box / Unfired * Free Ship

      1. For Sale
    • $520
    • Salem
    • Oregon
    New, unfired. This came to us from the distributor a couple of weeks ago. Ships free in the Pacific Northwest by USPS to your FFL. No transfer fee at my shop in Salem M-F 7am-3pm. Weekend (morning) appointments for members with established feedback only. Accept Cash, Check, VenMo, discrete...
  17. cowboykid8

    WTB Glock 20 Gen 3 10 round

      1. Want to Buy
    • Aloha
    • Oregon
    Looking for a Glock 20 gen 3 with 10 round magazine, 10mm. please send a few pics, condition and what you are hoping to get. Located in Aloha, OR willing to travel a bit. Thank you!
  18. sonnydaniels

    Glock 20 and 29 Factory Barrels

      1. For Sale
    • $115
    • Winlock
    • Washington
    The 20 barrel has about 60 rounds through it and the 29 has less than 40. Both pistols are Gen IV. I swapped both of them out with KKM barrels and I have put the Glock barrels in the KKM sleeves. FTF in Winlock/Toledo, WA area or I can ship the for another $10. If someone happens to wants to...
  19. OregonSig

    Safariland Glock 20/21 ALS/SLS Level 3 retention holster

      1. For Sale
    • $55
    • Eugene
    • Oregon
    Up for sale is a Safariland Glock 21 or 20 right hand OWB holster. It is their level 3 retention holster which offers an automatic locking system (ALS), along with a self locking system (SLS). Basketweave pattern, and suede lined inside to prevent finish wear on your pistol. Quick, double...
  20. Angler-Saxon

    Glock 20 SF Gen 3 10MM G20

      1. For Sale
      2. For Trade
    • $500
    • La Center
    • Washington
    Safe queen for sale. Glock 20 SF 10MM with very low round count. Everything is factory stock. Runs flawlessly. Selling cause I need to fund a new project. To be clear, this is the SF model. Gold and silver accepted. Possible trades: Premium AR15 Upper (willing to add cash on my end), Glock 44...
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