CM621 M4

Cyma CM621 – Affordable and reliable AR‑15 style replica for close‑ to mid‑range engagements

Why you should have it:

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• Cost‑effective AR‑15 variant – ideal for beginners and budget‑minded players.
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• Mid‑length inner barrel – perfect for CQB and mid‑range outdoor gameplay.
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• Lightweight and durable construction made from high‑quality ABS polymer.
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• Matte black finish and metal hi‑cap magazine included.
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• Semi‑automatic and full‑automatic firing modes.
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• Polymer Keymod handguard with integrated RIS top rail for tactical accessories.
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• 14 mm CCW threaded barrel – compatible with tracers, mock suppressors and muzzle devices.
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• Main metal components CNC‑machined from aluminium alloy and corrosion‑protected.
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• Aluminium outer barrel, magazine shell and multiple smaller structural elements.
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• Retractable stock – ideal for tight spaces, storage and battery placement.
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• Metal V2 gearbox – stable, reliable and highly upgrade‑friendly.
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• Total length: 740 mm collapsed / 820 mm extended.

As one of the oldest manufacturers on the airsoft market, Cyma has built decades of experience producing reliable electric and spring‑powered replicas.

The CM621 is an affordable yet solid AR‑15 style replica designed for players who want dependable performance at an excellent price.  Thanks to its mid‑length barrel, it excels both in indoor CQB environments and medium‑distance outdoor engagements.

The receiver and Keymod handguard are made from reinforced ABS polymer, making the rifle lightweight and comfortable to handle.  All major metal components — including the outer barrel, magazine shell and smaller fittings — are constructed from corrosion‑resistant aluminium alloy.

The 14 mm CCW threaded barrel allows the attachment of a wide range of muzzle accessories.  The retractable stock is easy to operate in confined areas and is specifically designed to house the battery safely and efficiently.

Internally, the CM621 features a reinforced **metal V2 gearbox**, ensuring reliable out‑of‑the‑box performance and providing an excellent base for future upgrades and customizations.

Barrel thread:

14mm CCW

Caliber:

6mm

Firing mode:

Fully automatic, Semi automatic

Gearbox version:

V2

Hopup:

Variable

Inner barrel length:

328 mm

Joule:

1.3 J (approx. 377 FPS, 0.20g BB)

Magazine capacity:

300 rds

Motor type:

Long

Plug:

T-Plug

Weapon model:

AR / M4