Reliability, realism, and durability in a single body. This mid-cap mechanical magazine from the renowned brand Cyma is specifically designed for M4/M16 series airsoft replicas. Featuring a classic steel shell, this magazine is not only built to withstand harsh battlefield conditions but also adds a satisfying, realistic weight to your rifle.
It operates just like its real-steel counterpart: BBs are fed automatically under constant pressure from an internal spring. This completely eliminates the need to constantly wind a wheel (unlike hi-cap magazines) and guarantees silent movement—no rattling BBs while you run.
Technical Specifications
| Parameter |
Value |
| Compatibility |
M4/M16 (AR15) series airsoft replicas |
| Capacity |
150 rounds |
| Magazine Type |
Mechanical (Mid-Cap) |
| Body Material |
Steel |
| Internal Components |
High-impact ABS plastic |
| Weight |
240 g |
Key Benefits
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Maximum Durability: The steel outer shell reliably protects the internal mechanism from chips, scratches, and damage caused by drops or fast tactical reloads.
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Milsim & Stealth: The ideal choice for reenactors and tactical players. Enjoy complete silence while moving with zero rattling.
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Consistent Feeding: The high-quality spring ensures smooth and reliable BB feeding into the hop-up chamber, even in high rate-of-fire replicas.
Important! First-Time Use Instructions
Mid-capacity mechanical magazines require proper break-in (priming) of the spring before regular, full-scale use. Failure to follow these steps may result in jamming or permanent damage to the internal feeding channel.
Rule #1: Do NOT load the magazine to full capacity right away!
It is strictly discouraged to fully load a brand-new magazine on its first use. Doing so creates excessive pressure on an unconditioned spring.
Step-by-Step Break-In Process:
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Lubrication: Before loading for the first time, apply a few drops of silicone oil into the feed lips (BB exit hole). This reduces friction inside the channel.
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Gradual Loading: Using a speedloader, load only 10–15 BBs into the magazine, then completely release them by pressing the mag lip retainer switch.
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Incremental Capacity: Repeat this process, increasing the amount by 10 BBs each time (e.g., 25, 35, 45... up to 150), emptying the magazine completely after each cycle. This allows the spring and the channel walls to properly seat and adapt to each other.
Post-Game Maintenance:
ALWAYS empty all BBs from the magazine after the game is over! Never store your magazines loaded at home. Leaving the spring uncompressed preserves its elasticity and significantly extends the lifespan of the product.
