Description
Cyma CM517 M4 Short AEG (Sports Line – Black – CM517)
Cyma CM517 M4 Short AEG (Sports Line – Black – CM517)
Build, Design & Ergonomics
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The CM517 features a polymer outer body — including the receiver, handguard, buffer tube, stock, and even magazine — which keeps the weight low (~1.8–1.9 kg) while maintaining durability.
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It sports a metal outer barrel, 14 mm CCW thread flash hider, polymer RAS/quad‑rail handguard, and both front and rear iron sights, ideal for accessory mounting.
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Includes a six‑position adjustable crane stock with rear sling plate and removable rear sight block for optics rail access
Internal Mechanics & Performance
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Powered by a Version 2 metal gearbox with steel gears, 8 mm bearings, reinforced spring guide, and high-torque motor—designed for reliability and upgrade flexibility.
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FPS runs around 300–350 fps with 0.20 g BBs—typically ~340 fps in UK spec models.
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Carefully engineered adjustable hop-up and tightbore barrel (~280 mm/6.08 mm) deliver respectable accuracy for the price range.
Dimensions & Included Extras
Feature | Specification |
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Length | ~690 mm collapsed / ~780 mm extended |
Weight | ~1.8–1.9 kg (roughly 4 lbs) |
Magazine | 300‑round Hi‑Cap included (fits standard M4 magazines) |
Fire Modes | Safe, Semi‑Auto & Full‑Auto modes |
Battery & Charger | Usually includes 8.4 V NiMH battery and charger (often UK charger) |
Pros
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Affordable and reliable metal gearbox with upgrade possibilities
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Lightweight polymer frame makes it easy to wield during longer sessions
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Adjustable hop-up and decent internal barrel contribute to accuracy beyond expectations
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Accepts standard M4 mags and numerous aftermarket parts
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Field-ready package: comes with mag, battery, charger, sling, and sights in most bundles
Summary
The CYMA CM517 M4 Short AEG Sports Line is a dependable and budget-conscious choice for both beginner and intermediate airsofters—especially in the UK. With solid build quality, modular rail options, and serious upgrade potential, it’s a great platform to build on or use straight from the box.