The PTS 170rd Enhanced Polymer Short Magazine (EPM1-S) is a cutting-edge, compact airsoft mid-cap magazine designed for high performance, reliability, and durability. Engineered using Dupont Zytel® high-performance polymer, this magazine delivers rugged strength while maintaining a lightweight profile—making it a perfect choice for serious airsoft players and training professionals alike.

Compact Size, Maximum Performance

The EPM1-S offers a unique combination of shorter form factor (20-round real steel length) and exceptional 170-round capacity, ideal for players who value both realism and high ammo efficiency. Unlike traditional bulky magazines, the compact size reduces profile, increases maneuverability, and helps streamline your loadout—without sacrificing round count.

Seamless Compatibility

This magazine is compatible with most M4/AR-15 style AEG platforms, including popular models from Tokyo Marui, KWA, VFC, G&P, and even HK416 variants, PTS ERGs, and the PTS Masada AEG. Whether you’re building a milsim-ready rifle or optimizing your CQB setup, the EPM1-S delivers seamless integration and flawless feeding.

Fuel Gauge Window with Orange Mag Level Indicator

One of the standout innovations of the EPM1-S is the “Fuel Gauge” window on the magazine body. A bright orange mag level indicator shows remaining BBs at a glance—whether you're fully loaded, half spent, or running empty. This feature dramatically enhances situational awareness, saving time and preventing costly dry fires in-game.

Built for Speed & Reliability

The newly designed magazine follower, developed in collaboration with Deranged Designs, ensures consistent, jam-free feeding under high rates of fire. It concentrates spring pressure directly along the BB stack, reducing resistance and eliminating misfeeds. Combined with a high-efficiency compression spring and low-friction internal shell, the EPM1-S is optimized for fast-paced, high-RPS airsoft setups.

Enhanced Ergonomics & Tactile Design

The magazine shell features PTS’ signature EP dot matrix texture and updated spine ridges, which offer improved grip even with gloves or in wet conditions. These ridges are also Maglink coupler compatible, letting you link multiple magazines together for fast reloads.

The redesigned baseplate provides added durability and function. It features a slimmer slide-in profile for easy storage and a ribbed front ledge to aid in pouch extraction. The angled heel also functions as a makeshift monopod for supported shooting positions. For added customization, a dot matrix is included for identification markings.

Durable and Field-Proven

Made entirely from Dupont Zytel®, the EPM1-S is field-proven to withstand drops, impacts, and environmental stress without cracking or warping. The short mag body reduces snagging during reloads, while the full-length mag well guide keeps draw and reinsertion smooth and consistent.

Specifications:

• Capacity: 170 rounds

• Material: Dupont Zytel® reinforced polymer

• Dimensions: 140 x 72 x 26mm

• Weight: ~160g

• Compatibility: Tokyo Marui, Matrix, APS, G&P, VFC, and other compatible M4/M16 AEGs

• Color: Available in Black and Dark Earth

About PTS

PTS (Professional Training & Simulation) is an industry leader in producing high-quality training equipment, licensed gear, and performance-enhancing airsoft accessories. With R&D teams in the USA and Asia, PTS focuses on innovation, realism, and end-user satisfaction—making them a trusted name among military trainers, milsim players, and airsoft professionals alike.

Whether you’re running drills or dominating the field, the PTS EPM1-S is a mid-cap magazine that doesn’t compromise—compact, reliable, and built to perform.