The H&K USP .45 ACP 12-Round Magazine with Extended Floorplate (HK part no. 215957S) is a factory Heckler & Koch replacement magazine built for the full-size USP .45 pistol. H&K builds this magazine with the same steel body and black finish as the magazine it replaces, so you get factory-correct fit, feeding, and durability. The extended polymer floorplate adds a finger rest, giving you a more secure grip during reloads without changing how the magazine seats in the pistol. It’s a practical spare for range days, duty carry, or home defense with a full-size USP .45.

Key Specifications

• Holds 12 rounds of .45 ACP for extended capacity over a standard USP .45 magazine.
• Chambered in .45 ACP, matching the full-size HK USP.
• Constructed of steel for factory-grade strength and durability.
• Finished in black to match the USP .45’s factory finish.
• Fitted with an extended polymer floorplate that adds a finger rest for a more secure grip during reloads.
• Measures approximately 5.0 inches long, 1.5 inches wide, and 1.0 inch tall, a compact footprint that’s easy to carry as a spare.
• Weighs approximately 0.25 lb empty, light enough to carry multiples without added bulk.
• Built exclusively for the full-size HK USP .45, not the compact variant.
• Uses a detachable box-magazine design for quick, tool-free reloads.

Frequently Asked Questions

Does this magazine fit the compact HK USP, or only the full-size model? This magazine is built for the full-size HK USP .45, not the compact variant.

What does the extended floorplate do? It adds a finger rest to the bottom of the magazine, giving you a more secure, comfortable grip during reloads.

Is this a genuine HK magazine? Yes, it’s a factory Heckler & Koch magazine built to the same steel construction and finish as the original equipment.

Buy the H&K USP .45 ACP 12-Round Magazine with Extended Floorplate

Add a genuine Heckler & Koch spare to your range bag or duty gear for your full-size USP .45. Order this factory 12-round magazine from our Lubbock, Texas gun shop for fast, insured shipping, and browse our full handgun magazines lineup for more USP-compatible spares.