Glock 21 Gen 5 MOS Handgun .45 Auto 10rd Magazines (3) 4.61" Barrel Black USA
$621.33
The Glock 21 Gen 5 MOS delivers .45 Auto stopping power with a 10+1 capacity, three included magazines, and a 4.61″ barrel. Its modular back strap, Gen 5 rough textured frame, and dual recoil spring assembly make it a top choice for duty and defense.
This item isn't stocked on our shelves. It ships to our Rubicon, WI store first, then is available for in-store pickup or transfer to your chosen FFL dealer (firearms only). Typical lead time varies by supplier — our team will follow up with a timeline after you order. Not available for direct home delivery. Firearm sales are final once accepted for transfer; no returns except for verified damage.
Out of stock
Remarkable for its accuracy and light recoil the Glock 21 Gen 5 delivers the legendary stopping power of the 45 ACP round with a higher magazine capacity. The modular back strap design on the Glock 21 Gen 5 for sale lets you instantly customize the grip to adapt to an individual shooter’s hand size. Its frame employs the scientifically designed real-world-tested Gen 5 rough textured technology. Internally the 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 Glock 21 Gen 5 is perfect for concealed carry and self-defense purposes.
| Weight | 3.950 lbs |
|---|---|
| Dimensions | 10.250 × 9.500 × 2.250 in |
| Manufacturer | Glock Inc. |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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