The Springfield Armory XD-M Compact Extended Magazine with Sleeve for Backstrap #1 – .40 S&W, 16-Round (XDM50111, UPC 706397888824) is a factory-original high-capacity magazine designed to maximize the performance, capacity, and ergonomics of your XD-M Compact pistol. Featuring a durable stainless steel body, a 16-round .40 S&W capacity, and an X-Tension grip sleeve sized for Backstrap #1 (small), this OEM mag seamlessly transforms your compact XD-M into a full-grip, full-capacity fighting or range pistol. gunclips.net+3store.springfield-armory.com+3Palmetto State Armory+3
Factory Original Springfield XD-M Compact Magazine – Built for Reliability
This is a genuine Springfield Armory XD-M Compact .40 S&W magazine, built in the same factory and to the same specifications as the mags that ship with your pistol from the factory. Classic Firearms+2gunclips.net+2
Official Springfield Armory OEM part – not an aftermarket clone
Engineered specifically for XD-M / XD-M Compact .40 S&W pistols
Ensures perfect fit, reliable feeding, and proper lock-back on the last round
For defensive use, training, and competition, OEM magazines are the gold standard when it comes to dependability.
16-Round .40 S&W Capacity – Stay in the Fight Longer
This extended magazine boosts your XD-M Compact’s onboard firepower to 16 rounds of .40 S&W. Sportsman's Outdoor Superstore+3AR15Discounts+3Palmetto State Armory+3
High-capacity design gives you more rounds between reloads
Ideal for range sessions, defensive carry (where legal), and competition
Great spare or replacement magazine to keep in your range bag, duty belt, or nightstand setup
If you want to train longer and reload less—or simply want more capacity on tap—this mag delivers.
Stainless Steel Construction with Polymer Components
The XDM50111 is built to handle real-world use and harsh environments:
This is a magazine designed to last through thousands of rounds of practice and years of carry.
X-Tension Sleeve for Backstrap #1 – Full Grip, Seamless Feel
What sets this magazine apart is the included black X-Tension sleeve that mates it perfectly to XD-M Compact pistols equipped with Backstrap #1 (small). Sportsman's Outdoor Superstore+3store.springfield-armory.com+3Palmetto State Armory+3
Sleeve fills the gap between the bottom of the compact grip frame and the base of the extended magazine
Creates a full-size grip profile for improved control and recoil management
Maintains a clean, factory look that feels like a natural extension of the pistol’s frame
Springfield uses backstrap numbers to indicate size: #1 = small, #2 = medium, #3 = large. This magazine is specifically labeled for Backstrap #1, ensuring the sleeve aligns perfectly with that grip insert. Buds Gun Shop+1
Better Control & Faster Follow-Up Shots
By giving your XD-M Compact a full-length grip with the X-Tension sleeve installed, this magazine helps you shoot more comfortably and effectively:
Extra grip surface for your pinky and support hand improves leverage and control
Enhanced stability can lead to faster, more accurate follow-up shots, especially with snappy .40 S&W loads GunMag Warehouse+2Classic Firearms+2
Perfect for shooters with larger hands who find the flush-fit compact grip too short
At the range or in defensive scenarios, better control translates directly into better performance.
Ideal for XD-M 3.8 Compact & XD-M Compact .40 S&W
This extended mag is tailored to the XD-M Compact platform (.40 S&W), including popular models like the XD-M 3.8 Compact. Palmetto State Armory+2Classic Firearms+2
Designed to work with Springfield XD-M Compact .40 S&W pistols using Backstrap #1
Functions as a factory replacement or spare magazine for training and duty use
Maintains Springfield’s intended ergonomics and balance when used with compatible models
Always verify that your pistol is an XD-M / XD-M Compact .40 S&W and that you’re using backstrap size #1 for optimal sleeve fit.
High-Capacity Magazine – Know Your Local Laws
This magazine’s 16-round capacity classifies it as a high-capacity mag in many jurisdictions. Several retailers note that it cannot be shipped to certain states due to local magazine capacity restrictions. Classic Firearms+2GunMag Warehouse+2
Before purchasing or carrying, be sure to:
Staying compliant keeps you and your gear on the right side of the law.
Key Features & Specifications – Springfield XD-M Compact Extended Magazine XDM50111
If you want to boost your XD-M Compact’s .40 S&W capacity to 16 rounds, while adding a full-size grip feel tailored to Backstrap #1, the Springfield Armory XD-M Compact Extended Magazine with Sleeve – .40 S&W, 16-Round (XDM50111, UPC 706397888824) is the factory-original solution that delivers reliability, capacity, and ergonomics in one smart upgrade.
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