SKU: 11631733853

Glock 21 Gen4

Sale price$640.80 Regular price$712.00
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

Glock 21 Gen4Remarkable for its accuracy and light recoil, the GLOCK 21 Gen4 delivers the legendary stopping power of the . 45 AUTO round with 10 round magazine capacity. The Modular Back Strap design on the G21 Gen4 lets you instantly customize its grip to adapt to an individual shooter's hand size. The surface of the frame employs the new scientifically designed, real world tested, Gen4 rough textured technology. Internally, the new GLOCK dual recoil spring

Remarkable for its accuracy and light recoil, the GLOCK 21 Gen4 delivers the legendary stopping power of the .45 AUTO round with 10 round magazine capacity. The Modular Back Strap design on the G21 Gen4 lets you instantly customize its grip to adapt to an individual shooter's hand size. The surface of the frame employs the new scientifically designed, real-world-tested, Gen4 rough textured technology.

Internally, the new GLOCK dual recoil spring assembly substantially increases the life of the system. A reversible enlarged magazine catch, changeable in seconds, accommodates left or right-handed operators. The Gen4 system is the perfect complement to this iconic .45 caliber cartridge.

FEATURES

  • Caliber: 45 AUTO
  • Mag Capacity: 10
  • Barrel length: 117mm
  • Weight: 830g
  • "Safe Action" system
  • Durable exterior finish
  • Cold hammer forged barrel
  • Durability
  • Reliability
  • Lightweight

The GLOCK Gen4 offers several additional features over the Gen3.

  • Two additional "snap-on" full-length back-straps (medium and large) for larger hands
  • Easy-to-grip Gen4 RTF (Rough Textured Finish) frame with pointed "pyramids" instead of checkering
  • Less recoil (slower slide velocity) due to the redesigned two-stage recoil spring assembly
  • Twice the recoil-spring rated service life
  • Smallest circumference short-grip frame GLOCK has ever offered
  • Shortest trigger reach GLOCK has ever offered
  • Larger mag catch with improved ergonomics
  • Reversible mag catch (30-second changeover to right side for left- handed shooters)
  • Fits standard holsters
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11631733853

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4.2 ★★★★★
Based on 17 reviews
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Verified Purchase
Dan
Port Orchard, US
★★★★★ 5
Lots of extras!
Size: 2+12+12+2 pack
The brushes are a bit flimsier than the original but otherwise fine. I needed it for the rectangular filters more than anything
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2026
P
Verified Purchase
Pan8ita
Boise, US
★★★★★ 5
EUFY 11S
Size: 2+8 pack
Used to replace the ones for my EUFY 11S vacuum. They fit just like the ones and got my vacuum back to cleaning really good. Didn’t realize how loud my vacuum had become until I replaced these parts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 19, 2025
A
Verified Purchase
Armeeda
Dallas, US
★★★★★ 5
Get this!
Size: 3+12+12+2+1 pack
Very nice pack of essentials for my robot.
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Reviewed in the United States on March 17, 2026
A
Verified Purchase
Alex
Birmingham, US
★★★★★ 5
Side brush screw PSA 🤪
Size: Eufy B-18Packs
Reviewing parts for Eufy L60 Review posted for some PSA When you get the brush replacement this kit comes with a tiny screw driver DO NOT USE THAT TINY SCREWDRIVER TO UNDO YOUR SIDE BRUSH IT WILL STRIP THE OEM SCREW AND MAKE IT USELESS. the screw driver included fits the screws that are about 2 mil wide the side brush screw is different. Grab a regular screw driver to undo a side brush. The main rolling brush cover is different but the rubber part still hits the floor at proper height so I don’t see a big issue there. When replacing the filter the filter cover was a little snug but I don’t see a big problem there just be aware to close the cover all the way but be careful not to push too hard so the plastic clips don’t break on the cover. Don’t forget to wipe down all the seals when installing the filter to maintain the seal integrity to keep the suction at top intensity. The dust bags seemed to be cut out with a stencil which gave the cardboard a better appearance than the oem cut out dust bags so that was interesting, dimensions were identical when comparing so I don’t anticipate any issues! Over all I’m glad we have cheaper alternative replacement parts that can be used so thank you! ❤️
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Reviewed in the United States on January 30, 2025
A
Verified Purchase
Amazon Customer
Pawtucket, US
★★★★★ 5
Great parts replacement kit for Eufy!
Size: Eufy B-18Packs, Size: Eufy B-18Packs
This kit has made it nice keeping up with our Eufy robot vacuum. All parts were free of defect and fit as it should. Instead of replacing individual piece by piece, I now just change all of the replacement parts at one time and it’s good to go for a while! Great value. Great quality. Will definitely be buying this kit again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026

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