User Ratings
No ratings yet
Be the first to review this product
Kriss MagEx2 Extension Kit for Glock 21 17rd Magazines (3-Pack) — Alpine White
The MagEx2 Extension Kit for Glock 21 is designed to increase the capacity of compatible Glock .45 ACP magazines by replacing the factory baseplate with an extended housing system.
Product Features
- Expands compatible Glock G21 .45 ACP magazines using a modular extension system
- Increases magazine capacity when properly installed on factory full-size magazines
- Multi-piece extension kit for durability and consistent feeding geometry
- Alpine White finish
- Pack includes three extension kits
- Designed specifically for full-size Glock magazine compatibility (G21 platform)
Product Specifications
- Style / MPN: KVA-MX2K45AP01
- Compatible platform: Glock 21 (.45 ACP full-size magazines)
- Magazine compatibility: 17-round factory magazines (G21)
- Kit configuration: 3-pack extension set
- Finish: Alpine White
- Material: Polymer (magazine extension components)
- Caliber compatibility: .45 ACP
Specifications
- Manufacturer:
- Kriss
- Category:
- magazine
- Platforms:
- Glock-Compatible
- MPN:
- KVA-MX2K45AP01
- Required Component:
- No
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Have one to sell?
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$87.99
Lowest
$87.99
Highest
$87.99
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertBundle Package
This is a bundled product that includes multiple components. The exact contents may vary - check the product description for more details.
• Complete assembly ready to use
• Multiple components included
• Value package pricing
Similar Products
Magpul PMAG GEN M3 AR-15/M16/M4 Magazine 5.56 NATO 30 Round
Magpul
$11.43
Magpul PMAG 10/30 AR/M4 GEN M3 10-Round Magazine, Black 5.56x45 NATO/.223 Rem
Magpul
$13.87
Magpul PMAG GEN M2 5.56mm 30-Round FDE Magazine with Window
Magpul
$11.88
Magpul MAG556-ODG Windowed PMAG 30 Gen M3 5.56/.223 Polymer Magazine OD Green
Magpul
$17.05
Magpul PMAG GEN M3 5.56x45/.223 30rd Window Rifle Magazine - MultiCam Black
Magpul Industries
$13.34
DuraMag Speed AR-15 Magazine 30rd Black Orange Follower
Duramag
$15.99
Magpul PMAG 30 Gen M3 AR-15 Magazine 5.56x45 NATO / .223 Remington
Magpul
$14.95
Amend2 AR-15 Polymer Mod 2 10rd .223/5.56 Magazine Black
Amend2
$6.69
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
AK Magazine Fit, Lockup, and Reliability Basics
A practical guide to AK magazine fit, front-to-back lockup, and how magazine variation affects feeding, bolt travel, and real-world reliability.
5 min read
Guide
The AK Platform: Core Design, Strengths, and Builder Tradeoffs
A practical AK overview covering operating system basics, parts ecosystem realities, and where the AK platform shines compared to AR-pattern rifles.
8 min read
Guide
AR-15 Caliber Options Beyond 5.56: What Changes and Why
A neutral overview of common AR-15 caliber paths beyond 5.56, including .300 Blackout, 6.5 Grendel, and .22 LR conversion approaches with practical system tradeoffs.
4 min read