ONE-MAG Magazine for M4 / AR15 by Specna Arms

Specna Arms introduces the new ONE-MAG mid-cap magazine designed for AEG rifles like M4 / M16 / MK18 and other platforms based on the AR-15 family. The ONE-MAG is the successor to the S-MAG series, which had a narrower profile that caused wobble in some replicas like the Specna Arms HK416 One™. The ONE-MAG features reinforced ridges in the upper portion to securely lock into the magwell. It is a universal, durable and affordable magazine with excellent feeding reliability. The body is made of lightweight yet strong polymer with a textured surface for confident handling. In short, one mag for all AR-15s – ONE-MAG.

Key Features

Capacity: 120 BBs

Plenty of ammo for lots of action.

Reliable feeding

Even with RoF above 20 BB/s.

Strong spring

Handles heavy BBs (0.30+ g) with ease.

Durable polymer

Tough yet lightweight construction.

Textured surface

Confident grip even with gloves.

Universal compatibility

Fits most AEGs based on AR15, including HK416 One™.

Technical Specifications

Type: Mid-Cap Magazine

Capacity: 120 BBs

Material: Polymer

Compatibility: M4 / AR15 / M16 / MK18 / HK416 and other AEG platforms (most brands)

Package Includes

ONE-MAG M4 / AR15 Magazine 120 BBs

Warnings & Recommendations

A BB loader is required for filling (not included).

Always store unloaded to extend spring life.

For first-time use, start with 20 BBs and cycle them out. Then repeat with 40 BBs, gradually increasing until full capacity, to break in the spring properly.