12 Umarex Glock 17 Gen 3 Extended Magazine of 2026 For Longer Shooting Sessions

1

Elite Force 20-Shot Airsoft Magazine for Glock 17 Gen3 (GHK)

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• ARS Mark

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  9.6
• Brand
  Elite Force

Key specs2

Platform Compatibility

GHK Glock 17 Gen 3 Airsoft

Magazine Feed Setup

Holds 20 rounds of 6mm airsoft ammunition and functions as a self-contained gas reservoir for blowback cycling.

Pros & cons42

Pros

• Delivers 20-shot repeating capacity for extended target shooting strings
• Engineered specifically for Glock 17 Gen 3 GHK gas blowback airsoft platforms
• Houses internal gas mechanism directly inside the full-size magazine body
• Feeds 6mm airsoft rounds smoothly for realistic slide cycling

Cons

• Incompatible with Umarex .177 steel BB blowback air pistols
• Requires dedicated GHK-system airsoft compatibility rather than standard VFC builds

2

TOFEIC Grip Frame Insert Plug for Gen 1-3 Glock 17

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  7.8
• Brand
  TOFEIC

Key specs2

Grip Channel Fit

Glock Gen 1 to Gen 3 frames

Frame Sealing

Plugs the open cavity behind the magwell to keep grit away from internal spring mechanisms.

Pros & cons42

Pros

• Fills the open grip cavity on Glock 17 Gen 1 to Gen 3 lower frames
• Helps deflect dirt and debris away from the internal magazine well
• Creates a flush bottom profile without interfering with magazine seating
• Friction fit installs directly without specialized armorer tools

Cons

• Does not increase BB or pellet magazine capacity
• Will not fit newer Gen 4 or Gen 5 Glock frames

3

Mag Extended Base Pad Plate for Airsoft Umarex/EliteForce Glock 17/19

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  8.8
• Brand
  Takteq

Key specs2

Base Plate Material

Molded nylon polymer

Replica Support

Crafted for Umarex and Elite Force airsoft magazines, but requires checking base locking tabs on Gen 3 frames.

Pros & cons33

Pros

• Provides an extended base pad profile for faster magazine extraction
• Molded from durable nylon polymer to withstand impact during practice drops
• Designed specifically for Umarex and Elite Force airsoft magazine profiles

Cons

• Engineered specifically for Gen 4 profiles rather than Gen 3 frames
• Provides ergonomic extension without adding extra BB capacity
• Requires checking base locking tabs before pairing with CO2 airgun magazines

4

Chrome Plated High-Performance Magazine Springs +13% Power (Large) Compatible with

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  7.4
• Brand
  Riot Balls

Key specs2

Spring Tension

+13% power over standard

Internal Application

Built for full-diameter firearm magazine bodies and will not fit narrow replica CO2 tracks.

Pros & cons42

Pros

• Provides +13% extra power tension for positive ammunition feeding
• Chrome plated finish resists corrosion and reduces friction inside the magazine tube
• Comes in a multi-pack of 5 replacement springs for long-term magazine service
• Designed for large frame Glock 17 and related full-size magazine tubes

Cons

• Designed for firearm magazine dimensions rather than narrow CO2 airgun BB channels
• Stiffer tension can make manual loading more difficult without a loader

5

Extension Fits Glock mid and Full Size Model Gen-1/2/3-17/19/22/23/24/31/32/34/35/37/38 -

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  8.7
• Brand
  Tactical Pro Sports

Key specs2

Frame Generation

Glock Gen 1, Gen 2, and Gen 3

Extension Role

Provides exterior grip length and handling leverage without altering the internal round count.

Pros & cons42

Pros

• Fits full-size Gen 1, Gen 2, and Gen 3 Glock frame profiles
• Extends the magazine base to provide added grip length for large hands
• Includes a pack of 2 extensions to upgrade multiple magazine bases at once
• Slips onto standard magazine channels for quick installation

Cons

• Does not expand internal airgun BB or CO2 gas volume
• Requires verification that base retainers match replica floorplates

6

EZMAGLOADER Magazine Loader for the Glock 17 19 22 23

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  9.3
• Brand
  EZMAGLOADER

Key specs2

Loading Mechanism

Flanged manual plunger

Feed Compatibility

Intended for centerfire firearm magazines and will not compress narrow .177 BB follower springs.

Pros & cons42

Pros

• Wide side flanges provide comfortable leverage to relieve thumb strain
• Speeds up loading cycles across Glock 17, 19, and full-size caliber magazines
• Durable molded construction withstands repeated range use
• Ergonomic grip profile prevents hand slippage during continuous loading

Cons

• Designed for centerfire 9mm, .40, and .357 magazines rather than .177 BB tracks
• Does not fit narrow airgun magazine feed lips without modification

7

Umarex GLOCK 17 Blowback .177 Caliber BB Gun Air Pistol,

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  9.6
• Brand
  Umarex

Key specs2

Caliber and Ammo Type

.177 caliber steel BB

Powerplant Integration

Houses a standard 12g CO2 cartridge inside the drop-free magazine body for authentic blowback action.

Pros & cons42

Pros

• Official factory spare magazine for the Umarex Glock 17 Gen 3 blowback air pistol
• Engineered specifically to feed standard .177 caliber steel BBs
• Houses both the CO2 capsule and the spring-loaded BB feeding channel
• Guarantees exact frame latching and slide-stop engagement on Gen 3 blowback models

Cons

• Cannot be used in 6mm airsoft replica frames
• Provides standard factory capacity rather than an extended high-capacity reservoir

8

Magpul GL Enhanced Mag Well , Glock 17 Gen 4

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  8.7
• Brand
  Magpul

Key specs2

Magwell Compatibility

Glock 17 Gen 4 only

Reload Funneling

Creates an enlarged funnel at the grip base for quick indexing, but will not fit Gen 3 airgun lower frames.

Pros & cons33

Pros

• Funnels the magazine base smoothly into the grip for faster reloads
• Constructed from reinforced Magpul polymer for impact resistance
• Maintains a low profile to prevent unnecessary bulk on the grip frame

Cons

• Engineered strictly for Glock 17 Gen 4 frames and does not fit Gen 3 replicas
• May block oversized magazine base pads from latching into the receiver
• Requires checking grip frame compatibility before purchase

9

TOFEIC Grip Frame Insert Plug for Gen 4/5 Glock 17

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  7.6
• Brand
  TOFEIC

Key specs2

Grip Channel Fit

Glock Gen 4 and Gen 5 frames

Cavity Protection

Seals the open frame channel on Gen 4 and 5 models, but leaves Gen 3 backstrap cavities unaddressed.

Pros & cons32

Pros

• Encloses the grip cavity to keep out mud, sand, and field debris
• Provides a neat flush finish along the back of the magwell
• Snap-in friction fit requires no screws or modifications to install

Cons

• Built specifically for Gen 4 and Gen 5 frames and will not fit Gen 3 models
• Serves solely as a cosmetic debris barrier with no magazine capacity benefit

10

2Pack Magazine Mount for Glock 17 19 22 23 26

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  9.2
• Brand
  TFNUO

Key specs2

Storage Capacity

12 magazine slots across 2 racks

Staging Setup

Wall-mounted racks keep multiple spare magazines organized and ready for rapid reloading sessions.

Pros & cons42

Pros

• Provides 12 dedicated storage slots across a 2-pack wall mount system
• Holds magazines upright for quick organization and clutter-free staging
• Accommodates Glock 17, 19, and similar full-size magazine profiles
• Allows rapid visual checks of loaded versus empty spare magazines

Cons

• Stationary wall storage that provides no extended capacity on the gun
• Narrow stick magazines from certain non-blowback BB guns may fit loosely

11

Nylon Enhanced Added Weight Extension for Gen 2-5 OEM Glock

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  9.6
• Brand
  Zzhununt

Key specs2

Added Weight Feature

Weighted base plate extension

Capacity Modification

Does not add extra BB or round capacity, functioning strictly as a weighted handling and protection pad.

Pros & cons42

Pros

• Adds balanced lower frame weight for improved handling and recoil control
• Tough nylon construction protects the magazine floorplate against drops
• Fits OEM Glock 17, 19X, 34, and 45 full-size magazine bodies
• Preserves factory spring travel without altering the internal feed mechanism

Cons

• Explicitly does not alter or increase round capacity
• Requires verification that base tabs slide onto Umarex CO2 airgun magazine bodies

12

Set of 2 Gold Plated Metal Magazine Base Plates Compatible

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  8.6
• Brand
  Riot Balls

Key specs2

Plate Material

Gold plated steel construction

Base Plate Replacement

Replaces flat firearm base pads with metal plates, but cannot replace CO2 magazine sealing bottoms.

Pros & cons42

Pros

• Solid steel construction delivers heavy-duty durability against impact damage
• Gold plated finish provides an eye-catching custom visual appearance
• Comes as a 2-pack to outfit multiple full-size magazines simultaneously
• Compatible across Gen 1 through Gen 5 centerfire Glock magazine bodies

Cons

• Does not fit drop-free CO2 magazines that house piercing screws in the floorplate
• Provides no additional ammunition capacity for longer strings of fire

Last update on 2026-10-10 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Will a real firearm Glock base pad fit an Umarex CO2 magazine?

No. Real firearm base pads are built for standard centerfire magazines and will not match the base profile of an Umarex CO2 magazine. Airgun magazines house internal CO2 puncture screws, gas valves, or spring channels that require replica-specific retaining plates. Installing a real firearm extension can block the gas seal or prevent the magazine from latching into the grip frame. Check that any extended base pad explicitly lists compatibility with Umarex or Elite Force Glock models before buying.

How do I verify if a Glock 17 magazine feeds .177 steel BBs or 6mm airsoft rounds?

Check the caliber and replica series listed on the packaging. Umarex offers distinct options, such as the Umarex GLOCK 17 Blowback .177 Caliber BB Gun Air Pistol Gen3 Spare Magazine for steel BBs, alongside 6mm options like the Elite Force 20-Shot Airsoft Magazine for Glock 17 Gen3 (GHK). Because .177 BBs and 6mm plastic BBs use completely different feed track widths, magazines built for one platform cannot feed the other in your CO2 BB gun setup.

Does an extended magazine base plate add extra round capacity?

It depends on the specific product design. Many aftermarket extensions, such as the Nylon Enhanced Added Weight Extension, provide extra grip surface and weight but explicitly do not alter round capacity. Other base components exist purely to help shooters strip stuck magazines during fast reloads. Verify the product specifications to confirm whether a part contains an extended ammo channel or serves purely as an ergonomic bumper.

Can I install Gen 4 or Gen 5 magwells on a Gen 3 Glock frame?

No. Frame profiles differ between generations, meaning parts like the Magpul GL Enhanced Mag Well designed for Glock 17 Gen 4 frames will not fit a Gen 3 frame properly. Grip plugs also follow these boundaries, with parts such as the TOFEIC Grip Frame Insert Plug offering separate versions for Gen 1-3 frames versus Gen 4/5 frames. Confirm that magwells and base extensions are labeled specifically for Gen 1 to Gen 3 frames so they seat firmly without blocking magazine insertion.

Can I use aftermarket firearm magazine springs to fix feeding issues in an Umarex magazine?

No. Firearm components like Chrome Plated High-Performance Magazine Springs +13% Power are sized for large firearm bodies and will not fit inside the narrow BB track or gas housing of a replica magazine. Forcing an oversized spring into an airgun magazine can crack the feed lips or crush the follower. If your replica magazine fails to push BBs smoothly, check the manufacturer diagram for original replacement springs sized for your specific Umarex model.

What should I check before buying an extended base pad if I run tactical practice drills?

Verify that the base pad clears your frame's grip opening and allows the magazine catch to lock completely. If you run sidearm drills alongside a tactical air rifle, bulky base plates can snag against magazine pouches or bump into flared grip plugs. Confirm that your base pads, grip inserts, and magazine catches are all designed to seat together without pushing the magazine out of alignment.