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The Specna Arm Core series (licensed by Rock Rivers Arm) introduces to the market affordable AEGS without any compromise on quality and performance. This new series is fully compatible with LIPO and LIFE battery. The weapon’s gearbox comes with upgrades like 8mm ball bearings, steels gears and is secured with 4 anti-reversal latches. For more precision and accuracy, a rotary Hop-Up with a 6.03 mm diameter tight bore barrel is also integrated which enable repeated shots at a stable variation of BBs. With those reinforced internals, the replica come out of the box ready to be use with a M140 spring. With an ESA™ Quick Spring Change System, you can adapt your replica’s power to your preferences or condition on your gaming sites. Quickly change your main spring. You must only remove the gearbox from the receiver to have access to it without the need to disassemble your gun or going to any workshop. The set also comes with M90 spring which is used to reduce your muzzle velocity in respect to your ranges or activity ensuring your safety. Not to forget one of its plus point. The use of high-quality polymer as one of its main materials does not reduce only its cost but its weight as well compared to normal full metal AEGS hence making it very eligible to beginner airsoft players, indoor gaming and CQB training as well. Easy to use, versatile, durable, crafted with precision. A weapon which is unique and ticks all the boxes.

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Top features:

  • Licensed Rock River Arms markings
  • ESA quick spring change system allows the spring to be changed without the need to disassemble your gun
  • Adjustable rotary hop-up system with 6.03mm tight bore barrel for range and accuracy
  • Sets include an M90 spring for velocity reduction
  • Compatible with LIPO and LIFE battery
  • Nylon reinforced polymer made it ultra-light and cheap
  • The receiver features fiberglass reinforcement which increases its durability as compared to polymer and metal ones and it also bears markings and a serial number
  • Free float quad rail handguard
  • Full length top 20mm features a removable flip up and can also be used for optoelectronic aiming devices
  • 14mm CCW threaded on the outer barrel to attach a wide array of silencers, suppressors or even more advanced tracer units up to 3.6cm in diameter.
  • A light made of polycarbonate polymer piston is equipped with a full steel strip to increase the replica’s durability.


  • Manufacturer: Specna arms (Hongkong branded manufacturer)
  • Colour: Black
  • Length: 800mm-880mm(adjustable)
  • Weight: 2300g
  • Magazine capacity: TBA
  • Muzzle velocity: 370 FPS (Measured with 0.20g BBs)
  • Thread direction: 4 mm negative
  • Gearbox: Rear wired V2 metal l, Fully Upgradeable
  • Motor: Long Type
  • Battery: 7.4v / 11.1v Buffer Tube LiPo Battery -Not included-
  • Hop up: yes, adjustable
  • Material: reinforced polymers (its receiver, stock pad and pistol grip), metal (the barrel, flash hider, enlarged charging handle and tactical sling swivels), steel (screws, pins, shell ejection window and mock bolt carrier). The receiver (fiberglass reinforcement)
  • Shot mode: Safe, Semi and Fully Automatic
  • Inner barrel: TBA


Colour:BlackHalf Tan
Gun Caliber:6 mm (.24 cal)6 mm (.24 cal)
Ammo Type:AirsoftAirsoft
Gun Action:Semi & Fully AutomaticSemi & Fully Automatic
Front Sight:Flip-upFlip-up
FPS:350 to 400350 to 400
Gun Material:Metal & PolymerPartially Metal
Rear Sight:Flip-upFlip-up
Power Source:ElectricElectric
Body Type:M4/M16M4/M16
Gun Blowback:Non-BlowbackNon-Blowback
Magazine Capacity:380380

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