Cyma cm517 m4 short aeg (sports line - black - cm517)

Build, Design & Ergonomics

• 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.

• 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.

• Includes a six-position adjustable crane stock with rear sling plate and removable rear sight block for optics rail access

Internal Mechanics & Performance

• 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.

• FPS runs around 300-350 fps with 0.20 g BBs - usually ~340 fps in UK spec models.

• 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
• 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

• Affordable and reliable metal gearbox with upgrade possibilities

• Lightweight polymer frame makes it easy to wield during longer sessions

• Adjustable hop-up and decent internal barrel contribute to accuracy beyond expectations

• Accepts standard M4 mags and numerous aftermarket parts

• 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.