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There's a reason Sig Sauer makes their own magazines instead of pointing you somewhere else. These aren't just generic single-stack tubes with a Sig sticker on them. The MAG-1911-9-8 is built from surgical-grade stainless steel throughout, with a stainless follower and a high-tensile wire spring engineered to feed consistently from the first round to the last. The body features wide-cut witness holes so you can get a round count at a glance without having to drop the mag, which is a small detail that matters a lot more than people think.
The flush-fit polymer baseplate keeps the overall profile clean and snag-free, which is a plus whether your 1911 lives in a range bag or a holster. It locks up solid, drops free cleanly, and sits flush with the grip on full-size and carry-frame Sig 1911 models. That 8+1 capacity when you chamber one on top gives you a full load of 9mm in a package that still feels like a proper 1911 in the hand.
Sig acknowledges that their magazines are produced by multiple manufacturers to their exact specifications, so minor differences in stamping or finish shade can show up from one batch to the next. That's worth knowing upfront, but it doesn't change what matters: the tolerances, the spring weight, and the feed geometry are all held to Sig's standards.
This is a solid pick as a replacement for a worn-out factory mag, or just a spare to throw in the range bag so you're not running back and forth with one magazine all afternoon. Sold individually.
This magazine is designed for Sig Sauer 1911 pistols chambered in 9mm, including full-size and carry-frame configurations. It is not intended for micro-format pistols like the P238 or P938, which use their own proprietary magazines. If you're unsure about your specific model, Sig Sauer's customer support can confirm compatibility using your serial number.
Standard-frame 1911 magazines are largely interchangeable across brands, and many owners of other 9mm 1911s report using Sig's factory mags without issue. That said, tolerances can vary between manufacturers, so fitment isn't always guaranteed. For the best results, verify with your firearm's manufacturer that standard 1911 magazines are compatible before depending on this one for carry.
On a full-size 1911, an 8-round single-stack tube is slightly longer than a 7-round tube, which can cause the base of the magazine to protrude a small amount below the grip. The flush-fit polymer baseplate on this magazine helps minimize that, and the fit is cleaner with a standard grip frame. If you run an aftermarket magwell or grip panels, double-check clearance before assuming a flush fit.
With 8 rounds in the magazine and one chambered, you get 9 rounds total of 9mm Luger on tap. That's a meaningful step up from the traditional 7+1 setup that comes standard on many 1911 platforms in this caliber, without requiring any frame modifications or extended base pads.
Yes, like most quality single-stack magazines, the baseplate on this Sig Sauer mag can be removed for disassembly, spring inspection, and cleaning. Regular cleaning and light lubrication of the magazine body and follower goes a long way toward keeping feeding smooth and reliable over time. Just take care with the baseplate during disassembly to avoid damaging it.
Sig Sauer produces their magazines through multiple qualified manufacturers, all held to Sig's own specifications. Because of this, minor cosmetic differences in stamping, markings, or finish tone can appear from one production run to the next. The core construction, spring weight, dimensions, and feed geometry remain consistent to Sig's standards regardless of where a given batch was made.
| UPC | 798681539451 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MAG-1911-9-8 |
| Brand Fit | Sig Sauer |
| Caliber/Gauge | 9mm |
| Capacity | 8 |
| Color | Stainless |
| Length | 8.4 |
| Model | |
| Model Fit | 1911 |
| Package Height | 1.8 |
| Package Width | 4.1 |
| Product Type | Accessory-Magazines |
| Quantity | 1 |
| Shipping Weight | 0.25 |
| Style | Detachable |
| Units per Box | 1 |
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