ALEX MAG AR 17HMR 10-Round Magazine – High-Capacity, Precision-Engineered for AR Rifles
Alexander Arms
The Alexander Arms 338LAP Ulfberht 10-round precision rifle magazine is built for shooters who demand reliability in a dedicated platform. If you own an Ulfberht chambered in .338 Lapua Magnum, this magazine is engineered specifically for your rifle—not a compromise fit across multiple platforms, but a purpose-built feeder designed to work with your gun. The polymer construction keeps weight minimal while delivering the ruggedness needed for field shooting, whether you're on a long-range hunt, running a precision rifle class, or testing ammunition at distance.
Built from injection-molded polymer, this magazine handles the demands of .338 Lapua Magnum loads without adding unnecessary bulk to your setup. The ten-round capacity strikes a balance between firepower and the practical handling you need when switching magazines matters. The engineering accounts for the specific cartridge length and feed geometry of the Ulfberht platform, so you get consistent, trouble-free function when it counts.
For Ulfberht owners, this is the right-tool-for-the-job choice. Precision rifles thrive on consistency, and using a magazine purpose-built for your platform removes one variable from the equation.
| Manufacturer | Alexander Arms |
| Caliber | .338 Lapua Magnum |
| Capacity | 10 rounds |
| Material | Injection-molded polymer |
| Maximum Cartridge Length | 3.75 inches |
| Platform | Alexander Arms Ulfberht |
This magazine is manufactured specifically for the Alexander Arms Ulfberht. Compatibility with other .338 Lapua platforms is not confirmed by the supplied specs, so verify fitment with your rifle before purchase.
The magazine is rated for a maximum cartridge length of 3.75 inches, which accommodates standard .338 Lapua Magnum loads.
The product name refers to a single 10-round magazine. Check the item quantity when ordering if you need multiples for your rifle.