Description
SIG SAUER 1911 Compact .45 ACP 7-Round Magazine
Keep a dependable spare or replacement ready for your compact SIG SAUER 1911 with this factory magazine. Built for compact and ultra-compact SIG 1911 pistols chambered in .45 ACP, it combines a seven-round capacity with a stainless-steel body and a compact-pattern fit. It is a practical choice for replacing a worn magazine, expanding a range-day rotation, or keeping a dedicated magazine for training and function checks.
Factory Fit for Compact SIG 1911 Pistols
This is a genuine SIG SAUER magazine rather than a generic universal-pattern accessory. Its dimensions and feed geometry are intended for the shorter magazine well used by compatible SIG SAUER 1911 Compact and Ultra Compact .45 ACP pistols. Because full-size and compact 1911 magazines can differ in length and fit, confirm your pistol model before ordering. This listing is for the compact seven-round version, not an eight-round full-size magazine.
Seven-Round .45 ACP Capacity
The single-stack magazine holds seven rounds of .45 ACP ammunition. That capacity is suited to compact 1911 frames while maintaining the streamlined profile expected from a compact-pattern magazine. A spare factory magazine is useful for organized practice sessions, carry-magazine rotation, and troubleshooting because it gives the shooter a known, model-specific component to compare against other magazines.
Stainless-Steel Construction
The stainless finish provides a clean factory appearance and durable metal construction for regular handling, loading, and insertion. Like any pistol magazine, it benefits from periodic inspection and cleaning. Keep the body and feed-lip area free of debris, inspect the follower and spring movement, and avoid excess lubricant that can attract grit inside the tube.
Key Features
- Manufacturer: SIG SAUER
- Compatibility: SIG SAUER 1911 Compact and compatible Ultra Compact .45 ACP pistols
- Caliber: .45 ACP
- Capacity: 7 rounds
- Body finish: Stainless
- Type: Detachable factory pistol magazine
- Manufacturer part number: MAG1911457 / MAG-1911-45-7
- UPC: 798681412129
- Package quantity: One magazine
Choosing the Correct Magazine
Before purchase, compare the pistol’s exact model, caliber, and grip-frame size with the specifications above. This magazine is specifically identified for .45 ACP compact-pattern SIG 1911 pistols. It is not intended for 9mm, 10mm, .380 ACP, or other chamberings, and it should not be selected solely because another pistol shares the general 1911 design. Magazine compatibility depends on the firearm’s caliber and frame dimensions.
Use and Care
For best results, load the magazine with the correct .45 ACP ammunition and test it with the specific pistol before relying on it for important use. New magazine springs may feel firm during initial loading. Never alter the feed lips, body, follower, or spring to force compatibility. If the magazine does not seat, lock, feed, or drop free as expected, unload the firearm and magazine and consult the pistol manual or a qualified armorer.
This SIG SAUER 1911 Compact magazine offers a straightforward factory replacement with the correct seven-round capacity, stainless construction, and exact compact-model identification. It is an easy way to add a properly matched spare to a SIG 1911 Compact setup.




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