Mag of the Month: SGM Tactical Extended .45 G21 GLOCK mag

May’s magazine of the month is the extended .45 Glock stick-mag from SGM Tactical. Formally known as Surefire Gun Magazine company, SGM Tactical made a name for itself selling affordable, standard-capacity, polymer Saiga 12 shotgun magazines in the early 2000s.

These were well received by Saiga enthusiasts and eventually led to the company venturing into new products like their flush-fitting Glock magazines in various calibers ranging from 9mm para to .45 ACP. Previously, the only option for extended Glock magazines were imported ones that lacked any metal reinforcement, or high-quality, high-priced factory examples in 9mm.

Factory-made extended mags were limited to 9mm, as they were initially designed for the select-fire version of the Glock 17, the Glock 18. These were prohibitively expensive and only functioned with 9mm Glock pistols. Shooters with other calibers had no recourse until SGM brought their new products to market.

Though they aren’t limited to simply functioning in Glock pistols. Several pistol caliber carbines like the Kriss Vector are designed to utilize ultra-durable, ubiquitous polymer-bodied magazines. Indeed, due to their durability and reliable feeding, these magazines have become the gold standard for pistol caliber carbines. The fact that they also function in Glock safe-action pistols isn’t just an added bonus, but an integral piece of a bigger, logistical plan.

Preppers and pragmatists alike can appreciate a carbine and pistol sharing not only caliber but also magazines. This makes keeping both fed during times of upheaval and uncertainty dramatically simpler.

Logistical boons aside, these SGM magazines are a fantastic investment and a great way to extend your shooting/practice sessions at the range. They increase the Glock 21’s magazine capacity from 12 to 26 rounds of hard-hitting .45 ammunition. This makes them ideal for home defense scenarios, where racing hearts and adrenaline rushes make accurate fire challenging.

SGM Tactical Glock 21, 30, 41, .45 ACP 26-Round Extended Magazine
These magazines utilize heavy-duty feeding springs, a self-leveling follower, steel body reinforcements, and even witness holes at the rear.

These magazines utilize heavy-duty feeding springs, a self-leveling follower, steel body reinforcements, and even witness holes at the rear.

When coupled with a quality tactical light, expanding defensive ammunition, and a sound suppressor, this makes an ideal home defense tool—one with a proven record of fight-stopping capabilities that won’t damage a shooter’s hearing or dangerously over-penetrate. Shooters looking to keep their Glock or .45 ACP-caliber carbine fed should take a serious look at SGM Tactical’s extended magazines.

These 26-round mags were used in the Glock Meltdown video below. The results are pretty impressive, as you’ll see for yourself.

Jim is a freelance writer for dozens of firearm publications, the host of the YouTube channel Burst Review and the youngest author to write a cover story for Shotgun News in its 86-years of operation. Jim loves anything that goes, ‘boom’ but particularly enjoys military firearms from the Cold War and WW2. When he’s not slinging lead downrange he can be round hiking in the mountains with his wife Kim and their vicious attack dog, Peanut.

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