MAGPUL AMAG 21 SG9 9MM SIG P320 SST
$37.95
Enhance your SIG P320’s performance with the Magpul AMAG 21 SG9 9mm magazine, offering a 21-round capacity and durable stainless steel construction.
1609 in stock
The Magpul Industries AMAG 21 SG9 is a 9mm magazine with a 21-round capacity. It fits the SIG P320 and features stainless steel construction with a silver finish.
- Manufacturer: Magpul Industries
- Model: AMAG 21 SG9
- Caliber: 9mm
- Capacity: 21 rounds
- Fit: SIG P320
- Material: Stainless steel
- Color: Silver
- Manufacturer Part Number: MGMPI1465SST
- UPC: 840815149323
| Weight | 0.188 lbs |
|---|---|
| Dimensions | 6.000 × 1.500 × 1.250 in |
| Manufacturer | Magpul Industries |
| Capacity | 21 |
| Material | Stainless Steel |
| Compatible With | SIG P320 |
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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