Specna Arms Rock River Arms SA-C04 CORE CQB Railed Carbine Rifle

Specna Arms
  • Railed Handguard
  • 14mm CCW Barrel
  • Quick Change Spring

A 6mm electric powered Airsoft gun based off the M4 platform famous the world over for it's success and deployment with countless forces in multiple conflict zones.

Full description


The combination of an attractive price point, a truly quick change spring system and high quality build materials makes this a fantastic value for money RIF. The Alloy components of the weapon (outer barrel, handguard & trim) are made from a Zinc and Aluminium Alloy which has been through an anodising process for maximum strength and durability. This Alloy is then powder coated for an exceptional feel and quality in the hands. The flash hider at the end of the weapon will remove (ensure grub screw is also removed) to reveal a 14mm CCW threaded outer barrel, ideal for adding tracer units, suppressors and other muzzle devices to further enhance the look of your rifle. The 20mm railed handguard is ready for your accessories straight out of the box and comes included with rail covers to provide a comfortable hand position for rail you are not using. Also included in the box is a foregrip for maximum stability when shouldering the weapon. The Polymers used on the rest of the weapon are Nylon reinforced Polymers which are exceptionally tough, long lasting and help bring a substantial yet usable weight to this M4 platform RIF. Included with the weapon are flip-up iron sights which make great standalone sights, but are also incredibly useful when used in conjunction with, or as a backup to your main optic/sight - they simply fold down and out of view when you don't need them. At the rear of the weapon you will find a six position Adjustable Stock which is ideal for a 9.6v 1600mAh NIMh battery or 7.4v 2000mAh LiPo, which are both high capacity batteries which should see a full day's Airsofting out of this weapon (depending on how trigger happy you are!). Other items included in the box are an EU pin charger, 9.6v 1100mAh NIMh battery, a 300 round High Cap Magazine and manual. The quick change spring system is very useful for those who play in multiple fields, or like to tinker with their weapon regularly, as you simply need to remove the buffer tube to access the main spring. This allows you to quickly change the output power of the weapon with minimal fuss.


  • Quick change spring system
  • Part of Specna Arms' Core series
  • SAEC™ System
  • Anodised Alloys
  • Nylon reinforced Polymers
  • Alloy 20mm railed handguard
  • Foregrip & rail covers included
  • 20mm railed receiver
  • Flip-up iron sights included
  • Rear wired V2 gearbox
  • Six Position Crane Stock
  • 6.03mm inner barrel
  • Steel gears
  • 8mm bearings
  • Highly compatible with M4 Magazine
  • 14mm CCW threaded outer barrel
  • Mini Tamiya connector in rear
  • Branded
    • 'Rock River Arms' (Logo)
    • 'COLONA, IL'
    • 'CAL. 5.56MM'
    • 'LAR-15'
    • 'PAT0011151BAS'

Package Includes:

  • Rock River Arms SA-C04 CORE CQB Railed Carbine Rifle
  • Magazine
  • Manual
  • Foregrip
  • Rail Covers

Special Instructions

The externals of the replica are metal where they would be on the real world gun. This includes things like the outer barrel, handguard, and receiver. If a real world gun has polymer parts then the gun will still be marked as full metal externals, examples of this would be an M4, where the Stock and Pistol Grip are always made from Polymer.



Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 300fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Included Items
  • Magazine
  • Instruction Manual
  • Foregrip
  • Stickers
Skill Level Icon
User Skill Level

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.43kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Black, Tan ,
Colour Wheel Greyscale
Secondary Colour
Black, Tan ,
Two Tone Icon
Pre Two-Toned
Construction Icon
Alloy flash hider, outer barrel, handguard & trim. Polymer receiver, pistol grip, rail covers, buffer tube & stock.
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
M4 / AR15 / M16
Magazine Style Icon
Magazine Style
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Behind mock bolt plate when charging handle to the rear


Weapon Furniture Icon
  • Railed Handguard
  • Flip-Up Ironsights
  • Railed Receiver
  • Sliding Stock
  • Threaded Outer Barrel
Rail System Icon
Rail System
20mm RIS / RAS
Icon Stock Positions
Stock Setting
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights
Sling Plate Icon
Sling Options


Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size

Magazine Specific

Magazine Type
High Capacity, AEG,
Magazine BB Capacity
Approx. 300 Rounds
Magazine BB Fill Method
Fill Window

Electric Gun Specific Information

Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Battery Specific
Battery Connector
Patrol Base | Icon | Mini Tamiya
Mini Tamiya
Suggested Battery
Suggested Battery Type
Suggested Battery Configuration
Suggested Battery Voltage

Product Testing Data

Notepad Icon
Test Description
Notepad Icon
Tested Using
ASG Blaster 0.20g BBs
Notepad Icon
Test Date

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