Over the past several years, Die Free Co. (DFCO) has produced a series of popular polymer parts. Beginning with the Kung Fu Grip and followed by the Tiger Claw angled foregrip, DFCO recently introduced its “Dos Boot” magazine extension.
The DFCO Dos Boot is an injection-molded polymer baseplate replacement designed for Magpul Industries Corp.’s M3 PMAGs. The Dos Boot increases capacity by two rounds for 10-, 20-, 30-, or 40-round M3 magazines. It features a curved, aggressively textured bottom profile for enhanced stabilization. According to DFCO, the Dos Boot was specifically designed for the 20-round PMAG, where it optimally balances the rifle when stabilized from a bench or prone position.
I received a pack of Dos Boot extensions for testing. For full disclosure, I am a DFCO affiliate and was provided these Dos Boot extensions at no cost. Lacking high-quality video recording equipment, this review relies on my firsthand observations, so “trust me bro”. With that noted, I tested the Dos Boot extensions against a concrete slab to evaluate whether the additional two-round capacity negatively affected round retention.
For the test, I used a new Magpul TMAG and an older, stippled 20-round M3 PMAG. I established a baseline by loading each magazine to its maximum capacity and dropping them three times from a height of three feet onto the concrete, ensuring impact on the factory baseplate each time. Neither the 30-round TMAG nor the 20-round PMAG lost any rounds during the test.
Each magazine was unloaded, and the DFCO Dos Boot baseplates were installed without tools in approximately five seconds per magazine. Note that you should firmly tap the magazine to properly seat the floorplate into the slot on the Dos Boot extension.
The magazines were then loaded to their new “+2” capacities (32 rounds for the TMAG and 22 rounds for the 20-round M3 PMAG) and subjected to the same drop test from a height of three feet. Neither magazine lost any rounds during their three repeated drop test trials. The magazines and DFCO extensions showed no damage beyond a few minor scuffs from impacting less polished areas of the concrete slab.
When fully loaded, the “indicator” mark on the TMAG’s spring sits approximately halfway between the “30” mark and the bottom of the magazine. I was unable to seat the TMAG loaded with 32 rounds on a closed bolt, though this issue is more related to the TMAG itself than the Dos Boot. My TMAG required significant force to seat properly with only 30 rounds and the original M3 baseplate. This was not an issue with other M3 PMAGs.Priced at $20 for a pack of three Dos Boot magazine extensions and a Dos Boot Cowboy sticker, this is one of the most cost-effective magazine extensions and monopods available. A comparable polymer competitor, the Multitasker MagPod, retails for $24.95 per pack of three and similarly stabilizes a rifle with a 20-round PMAG. However, the MagPod does not increase magazine capacity, features angular geometry, and is designed to retain a Multitasker Nano tool.
The Dos Boot provides significant value by enhancing the functionality of one of the most widely used magazine designs on the market. At an affordable price, these extensions can upgrade your loadout in seconds. My only question for DFCO is: “Why haven’t you released it in green yet?”
Also if you want to purchase your own pack of Dos Boot extensions, you can use code FRIED10 at DFCO for 10% off. We will receive a modest commission through the use of this coupon code at no cost to you!
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