Specna Arms Rock River Arms SA-C11 CORE Carbine

Specna Arms
Product code:
  • Rotary HOP Unit
  • Quick Change Spring
  • Fully Licensed Design

A fully licensed and fully spec'd compact, electric-powered M4 replica which is perfect for CQB scenarios, and is more than happy to hold its' own on the outdoor fields too. 

Full description


This electric-powered Airsoft Gun is a compact and versatile RIF based on the M4 platform, which is capable of performing in both indoor and outdoor arenas. It features a licensed design with markings on the receiver from Rock River Arms, who are an American firearms manufacturer. This RIF is part of the CORE range which are targeted at beginners, offering higher quality internals than you would expect at the price point, coupled with a lightweight Polymer body which is tough and solid.

The front of the rifle features an Alloy-made suppressor, which can be removed to reveal a 14mm CCW thread should you wish to install your own suppressor or tracer unit. The four-point 20mm handguard is made from Alloy to be as tough as possible, and provide a rigid support in combination with the Alloy outer barrel assembly, making the whole RIF very solid, and ready for reasonable amounts of abuse. The top of the receiver features a full-length 20mm rail which runs down to the rear of the receiver, and is perfect for mounting any optics, sights or scopes you may have, but comes with a set of spring-loaded flip-up ironsights out of the box. The receiver is made from a tough Nylon Fiber which has licensed Rock River Arms makings, and traditional AR platform fire controls which anyone who has used this platform before will be used to. The rear of the replica features a six-position sliding Crane Stock which is also where the battery is housed. It can be set to multiple positions for all sizes of user, and can be removed entirely from the buffer tube or opened from the rear to access the battery compartment. There is ample room inside the stock to accept a Crane-Stock style NiMH or LiPO battery, connected to the Mini-Tamiya connector.

The main feature of this RIF is the ESA™ Quick Change Spring system which reduces the time taken to change the main spring down to roughly 45 seconds if you know what you're doing. Simply remove the spring guide from inside the buffer tube with a screw driver to make changes. This is perfect if you play at multiple fields with different power limits, or want to quickly switch between different gameplay roles which require different output FPS.

Internally, the SA-C11 features a tonne of goodies, such as a Rotary HOP unit which allows for really precise adjustments for the perfect settings. The gearbox features 8mm bearings, multiple anti reversal latches, a Polycarbonate Piston with Steel Rack, and a 6.03mm Precision Inner Barrel completes the package to ensure accurate, long-life performance.

If you're looking for a compact package with familiar controls, that can perform in all environments, then the Rock River Arms SA-C11 CORE Carbine will be just what you are looking for.


  • Rock River Arms licensed
  • ESA™ Quick Change Spring
  • 6.03mm Precision Inner Barrel
  • Rotary HOP Unit
  • Included Suppressor
  • 14mm CCW Thread
  • Flip-Up Ironsight Set
  • High Quality Nylon Fiber & Alloy
  • Steel Rack Piston
  • 8mm Bearing Gearbox
  • Version 2 Design
  • Mini-Tamiya Connector
  • Ideal Starter Gun
  • 380rnd High Cap Magazine

Package Includes:

  • Rock River Arms SA-C11 CORE Carbine
  • 380rnd High Cap Magazine
  • Instruction Manual
  • Sticker Set



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. 310fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Included Items
  • Magazine
  • Instruction Manual
  • Ironsight Set
Skill Level Icon
User Skill Level
Starter, Regular Player,

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.35kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Black, Tan ,
Construction Icon
Alloy outer barrel assembly, handguard, suppressor and fire controls. Polymer receiver, pistol grip and stock. Steel trim.
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
AR Platform, M4 / AR15 / M16,
Magazine Style Icon
Magazine Style
STANAG, AR Platform,
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
Adjustable behind dust cover


Weapon Furniture Icon
  • Railed Handguard
  • Suppressor
  • Flip-Up Ironsights
  • Railed Receiver
  • Sliding Stock
  • Threaded Outer Barrel
  • QD Sling Point
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
Stock , QD ,


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

Magazine Specific

Magazine Type
High Capacity, AEG,
Magazine BB Capacity
Approx. 380 Rounds
Magazine BB Fill Method
Fill Window
Magazine BB Fill Location

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

Detailed Power Tests

FPS, using 0.20g BB
Approx. 310fps, using 0.20g BB

Take this Airsoft gun to the next level!

Like this Airsoft Gun? Check out these awesome Products!