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The brutalist Maxim Defense Industries PDX direct impingement semiautomatic is subcompact, functional and futuristic. Shoehorned into a remarkably compact 18.75” long package is a 5.5” long barrel, Maxim Defense HATEBRAKE muzzle booster, ALG Combat Trigger (ACT) and a Maxim Defense SCW stock. Even with all this, or actually because of it, total weight, empty, is only 5 pounds 11 ounces. PDX can be had in either black or arid (meaning a desert tan palette of colors) and in three different calibers: 5.56 NATO, .300 BLK or 7.62x39mm.

The gun was designed in response to the US government’s Special Operations Command Personal Defense Weapon (SOCOM PDW) RFP. In other words, the gun was designed to meet the highly strenuous and rigorous close quarter operations needs of Tier 1 Special Forces troops. But go beyond the startling first impression and everything is fully familiar. It’s just the compact proportions that are unusual.

The PDX’s van is Maxim’s in-house HATEBRAKE muzzle booster. Though muzzle boosters aren’t necessarily designed to reduce felt recoil, this one does. It also harnesses vented gasses to set the gun up for faster follow-up shots.

The PDX’s stern is Maxim’s MILSPEC anodized SCW stock. It has five positions, collapses down to just 4” long or extends up to 8.75” with other positions in between at either 1.25” or 1.0” intervals. The 7075 aluminum framework means it weighs only 14.6 ounces! There is also a less expensive Maxim PDW pistol brace available. It also has five positions and is also made of 7075 aluminum. This stock actually extends all the way to 10” and weighs 19 ounces. Both have extended cheek welds.

Maxim PDX semi-automatics come standard with a 20-round magazine. The PDX earned the Recoil Magazine’s coveted “BEST OF SHOT 2019” award. The company is based in St. Cloud, Minnesota.

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