PTS EPM1-RX 250rd M4 AEG Mid-Cap Magazine

The PTS EPM1-RX is the latest evolution of the industry-leading EPM1 250-round mid-cap AEG magazine, delivering refined internal geometry for even smoother feeding and more consistent performance under high rates of fire.

The RX revision introduces newly tooled internal shells, identified by their grey color and EPM1-RX markings, which improve dimensional accuracy and reduce friction within the BB channel. The result is a magazine that loads easier, feeds smoother, and maintains the legendary reliability the EPM1 platform is known for.

Important Note:
The FDE EPM1-RX currently retains the original black internal shell, while Black models feature the updated RX internals.

Despite the internal update, the EPM1-RX retains all of the features that made the original EPM1 a benchmark in airsoft magazines.

What Makes the EPM1-RX Special

The EPM1 was the first spring-loaded AEG magazine to truly rival high-cap capacity while maintaining mid-cap reliability. Developed in collaboration with Odin Innovations, the EPM1 platform redefined what players could expect from a performance magazine.

The signature Fuel Gauge Window gives you instant visual confirmation of remaining BBs using a high-visibility orange follower, eliminating guesswork during reloads. When the magazine is full, the indicator sits at the top of the window and gradually descends as BBs are fired.

Constructed from Dupont™ Zytel® reinforced polymer, the EPM1-RX shell is extremely durable while remaining lightweight. The continuous magwell guide minimizes snagging during reloads, while the revised ridge texture along the spine improves grip and allows compatibility with Magpul Maglink® couplers.

The redesigned low-profile slide-in baseplate is slimmer, more impact-resistant, and features an angled heel for monopod-style supported shooting. A molded dot matrix allows for easy magazine identification.

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Key Features

• 250+ round mid-cap capacity with high-cap-like performance

• Updated RX internal shell for smoother BB feeding (Black models)

• High-visibility fuel gauge window with orange BB level indicator

• High-efficiency compression spring for consistent feeding at high ROF

• Dupont™ Zytel® reinforced polymer shell for extreme durability

• Low-friction internal geometry for improved loading and reliability

• Continuous magwell guide to reduce snagging during reloads

• EP dot texture + ridge spine for enhanced grip and Maglink® compatibility

• Slim, reinforced baseplate with angled monopod surface and ID matrix

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Compatibility

Compatible with most Tokyo Marui-spec AR-15 / M4 AEG platforms, including:

• Tokyo Marui AR-15 AEGs

• G&P AR-15 AEGs

• KWA AR-15 & ERG AEGs

• VFC AR-15 & HK416 AEGs

• PTS ERG Series

• PTS Masada AEG

• PTS PDR-C AEG

• Classic Army AR-15 / 416 AEGs

• AMOEBA AM Series AEGs

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Disclaimer

This product is intended for airsoft, training, and simulation use only. It is not compatible with real firearms. Improper use may result in serious injury. PTS assumes no liability for misuse.