Heckler & Koch USP Compact Magazine Cal. .45 ACP 8 Round 2nd Hand

Overview

This is a factory Heckler & Koch magazine built for the USP Compact chambered in.45 ACP, and it also drops straight into the HK45 Compact. Heckler & Koch has built its reputation in Oberndorf, Germany on parts that keep working long after cheaper alternatives have given up, and this magazine is a good example of that philosophy: a steel body, a factory spring and a polymer follower and floor plate, stamped with HK's own factory codes rather than an aftermarket copy. The stamped 46 C marking visible on the body reads as HK's internal part or date code and is consistent with genuine factory production rather than a third-party clone.

The USP Compact was HK's answer to shooters who wanted the reliability of the full-size USP.45 in a body that concealed better, and the factory 8-round magazine is the piece that makes that compromise work: it keeps the grip short enough for concealed carry while still giving a full-power.45 ACP round nine in the pipe. Buyers upgrading from full-size USP or HK45 magazines will notice the shorter body and the witness holes stamped from 2 through 8 down the back of the magazine, letting you check your load at a glance without dropping the mag.

This particular unit is sold second hand. It shows the finish wear you would expect from a magazine that has seen genuine range use - some surface staining and light patina on the steel body - but no dents, cracks or feed lip damage, and the spring and follower move freely.

Key Features

• Steel magazine body and factory spring hold their shape and tension far longer than the cheap alloy or polymer-bodied magazines sold as compatible replacements, so feeding stays consistent round after round.
• The high-strength polymer follower rides smoothly against the case walls and helps prevent the tip-forward jams that steel-on-steel followers can develop over years of use.
• A polymer floor plate with a finger rest gives your support hand a solid purchase point during reloads and helps seat the magazine positively on a fast insertion.
• Witness holes numbered 2 to 8 down the spine of the magazine let you gauge remaining rounds by sight or by touch in low light, without having to strip the magazine to check.
• The 8-round capacity keeps the magazine flush with the Compact's shortened grip frame, so there is no extended baseplate hanging below the frame to print under a cover garment or catch on a holster.
• Because it shares HK's factory magazine well dimensions across the platform, it also drops into the HK45 Compact without modification, giving owners of both pistols a single spare-magazine pool.

Technical Specifications

Fit & Compatibility

This magazine is built for the USP Compact in.45 ACP and the HK45 Compact - it will not fit the full-size USP45 or HK45, and it will not fit USP or USP Compact pistols chambered in 9mm,.40 S&W or.357 SIG, which use a different magazine well width. Owners who run both a USP Compact.45 and an HK45 Compact can standardise on this single magazine across both guns, which is one of the more useful crossovers in the HK lineup. It will not interchange with the 10-round HK45 magazine unless that magazine is also rated for the Compact frame, so check the baseplate length before assuming a longer magazine will sit flush.

Materials & Construction

The body is stamped and welded steel rather than the cast or extruded aluminium used in some third-party magazines, which is why HK factory magazines are heavier in the hand but hold their feed-lip geometry through years of loading and unloading. The polymer follower and floor plate save weight where it doesn't matter to reliability, and the spring is a factory-wound flat wire design matched to the.45 ACP's case dimensions, giving consistent upward pressure through all eight rounds rather than the taper-off you get from generic replacement springs.

Care & Maintenance

Field-strip the magazine periodically by depressing the floor plate retaining tab and sliding the plate forward off the body, then lift out the spring and follower for cleaning. Wipe the feed lips dry after solvents and keep oil out of the body interior, since it attracts grit that slows the follower. On a second-hand magazine like this one, cycle it empty a few times and load it fully overnight before a range trip to confirm the spring still delivers full tension.

Brand Background

Heckler & Koch has supplied military and police sidearms since the 1970s. The USP family, introduced in 1993, was the firm's first ground-up polymer-framed pistol built for the American and export markets, and the Compact variant followed to give a carry-sized option without giving up the platform's mechanical recoil reduction system.

Who It's For

This magazine suits existing USP Compact.45 or HK45 Compact owners who need a genuine spare or a replacement for a worn factory magazine, rather than shooters looking for a first magazine on a budget. Because it's second hand, it's best suited to buyers who are comfortable inspecting and function-testing a used part rather than those who need a magazine straight out of the box with a full warranty.

FAQ

Will this fit my full-size USP45? No - the Compact magazine is shorter and will not seat correctly in the full-size USP45 or HK45 magazine well.

Can I use it in a 9mm USP Compact? No - the.45 ACP magazine well is wider than the 9mm/.40 pattern and the two are not interchangeable.

Is the 46 C marking a problem? No - it reads as a factory batch or date stamp consistent with genuine HK manufacture, not damage or an aftermarket alteration.

How many rounds does the magazine hold? Eight rounds of.45 ACP, giving nine total with one chambered.

Does it come with a spare spring or follower? No - this listing is for the complete assembled magazine only, as pictured.