
Availability: In Stock
The Ruger American Pistol Compact Magazine Adapter (Model 90640) is a straightforward solution for shooters who own both the full-size and compact versions of the Ruger American Pistol in .45 ACP. This black polymer adapter lets you run your existing full-size magazines in the Compact frame, eliminating the need to buy a separate magazine set and giving you more flexibility at the range or in the field. It's a genuine Ruger factory accessory, so you know it's built to Ruger's specifications and will function reliably with your pistol.
If you've already invested in 10-round .45 Auto magazines for the full-size American Pistol, the Compact Magazine Adapter makes switching between platforms practical and economical. It's a common scenario for shooters who carry the Compact but train or shoot competitions with the full-size version—this adapter bridges that gap without forcing you to maintain duplicate magazine inventories.
As a polymer accessory, it's durable and lightweight, with no complicated installation required. Ruger's attention to fit and function means you can trust this adapter to perform consistently, whether you're at the range or relying on your pistol for personal defense.
| Manufacturer | Ruger |
| Model Number | 90640 |
| Caliber | .45 ACP |
| Material | Black Polymer |
| Application | Ruger American Pistol Compact |
| Compatibility | Ruger American Pistol full-size 10-round magazines |
The Compact Magazine Adapter is designed to convert 10-round .45 Auto magazines from the full-size Ruger American Pistol (Model 90512) for use in the Compact model.
Yes, this is a genuine Ruger factory accessory built specifically for the Ruger American Pistol Compact in .45 ACP. It adapts full-size magazines to function in the Compact frame.
No. If you already own full-size American Pistol .45 ACP magazines, this adapter allows you to use them in your Compact without purchasing additional magazines.
The supplied facts do not include installation details. We recommend consulting your pistol manual or contacting Ruger customer service for setup guidance.

SKU: 115665492 • Width: 3.4in • Height: 1.5in • Depth: 6.8in • Weight: 0.08oz
Availability: In Stock
The Ruger American Pistol Compact Magazine Adapter (Model 90640) is a straightforward solution for shooters who own both the full-size and compact versions of the Ruger American Pistol in .45 ACP. This black polymer adapter lets you run your existing full-size magazines in the Compact frame, eliminating the need to buy a separate magazine set and giving you more flexibility at the range or in the field. It's a genuine Ruger factory accessory, so you know it's built to Ruger's specifications and will function reliably with your pistol.
If you've already invested in 10-round .45 Auto magazines for the full-size American Pistol, the Compact Magazine Adapter makes switching between platforms practical and economical. It's a common scenario for shooters who carry the Compact but train or shoot competitions with the full-size version—this adapter bridges that gap without forcing you to maintain duplicate magazine inventories.
As a polymer accessory, it's durable and lightweight, with no complicated installation required. Ruger's attention to fit and function means you can trust this adapter to perform consistently, whether you're at the range or relying on your pistol for personal defense.
| Manufacturer | Ruger |
| Model Number | 90640 |
| Caliber | .45 ACP |
| Material | Black Polymer |
| Application | Ruger American Pistol Compact |
| Compatibility | Ruger American Pistol full-size 10-round magazines |
The Compact Magazine Adapter is designed to convert 10-round .45 Auto magazines from the full-size Ruger American Pistol (Model 90512) for use in the Compact model.
Yes, this is a genuine Ruger factory accessory built specifically for the Ruger American Pistol Compact in .45 ACP. It adapts full-size magazines to function in the Compact frame.
No. If you already own full-size American Pistol .45 ACP magazines, this adapter allows you to use them in your Compact without purchasing additional magazines.
The supplied facts do not include installation details. We recommend consulting your pistol manual or contacting Ruger customer service for setup guidance.
SKU: 115665492 • Width: 3.4in • Height: 1.5in • Depth: 6.8in • Weight: 0.08oz
