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Specna Arms / Rock River Arms Licensed CORE Series M4 AEG (Model: M4 URX / Black SA-C06)

ID: 90424 (AEG-SA-C06)
SA-C06 / SPE-01-018323-00
Specna Arms859188904248SA-C06 / SPE-01-018323-0090424
4.8 stars, based on 15 reviews
Specna Arms / Rock River Arms Licensed CORE Series M4 AEG (Model: M4 URX / Black SA-C06)
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Specna Arms


MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!


  • Ultra lightweight fiberglass reinforced polymer receiver
  • Licensed Rock River Arms logos
  • Nylon fiber furniture
  • Metal barrel assembly, flash hider, charging handle, and sling swivels
  • ESA™ quick spring change system allows the spring to be changed without the need to disassemble your gun
  • Rotary type hopup with 6.03mm tight bore barrel
  • 380 fps spring pre-installed from factory, optional 310 fps (M90) spring included to reduce muzzle velocity
  • Freefloat quad rail handguard

FPS Range: 375-390

Color: Black

Specna Arms meets the expectations of clients by presenting the CORE™ line of products - an exceptional series of replicas that introduces a new quality to the market. An attractive price in combination with an innovative spring change system as well as high-quality materials make this replica suitable for beginners and seasoned airsoft players alike.
The receiver, stock slide, handguard and a SF stock that holds the battery, as well as the pistol grip, were made from nylon reinforced polymer. Remaining components such as the barrel, flash hider, enlarged charging handle and tactical sling swivels were made of metal (parts made of steel include the screws, pins, shell ejection window and mock bolt carrier). The receiver bears markings and a serial number.
The replicas parts fit very well together and the User will not experience any loose spots between the lower and upper receiver. The use of a light polymer receiver allowed for a reduced weight, which makes it very suitable for dynamic games or long-lasting mil-sims. Whats more, fiberglass reinforcement makes the receiver also more durable than polymer and metal receivers.

The replica features a ESA™ Quick Spring Change System. Due to that system, it is possible to rapidly and quickly adapt the power of the replica to the conditions expected on the playing field without the necessity to have the access to a workshop or a set of special tools - all that is required is to remove the stock slide in order to gain access to the spring so that it can be removed without having to pull out or disassemble the gearbox.
The advantages of ESA™ system are hard to overstate. In the light of the current internal regulations inside various groups, the system guarantees the User a varied set of possibilities and plenty of freedom. ESA™ system allows with a minimal amount of time to change the main spring, thusly customize the muzzle velocity towards the area of the game in such a way so as to guarantee an ideal compromise between the effectiveness of fire and safety for the User himself as well as other participants.

The replica is fully compatible with LiPo and LiFe batteries. Due to a base muzzle velocity of ~380 FPS provided by the main spring installed by default by the manufacturer, the replica is perfect for operating on a medium range. The set also includes an M90 spring, which allows reducing the muzzle velocity to ~310 FPS and as a result to adapt the replica for close-ranged and indoor operations.
The gearbox contains 8 mm slide bearings as well as shimmed steel gears based on them. The system is secured with four anti-reversal latches. A light, made of a polycarbonate polymer piston is equipped with a full steel strip, in order to increase its durability. Also, implemented were a type 0 cylinder and a steel circuit-breaker, as well as a precise rotary Hop-Up chamber. The durability of parts allows for the cooperation with M140 springs.
The precisely-made rotary type Hop-Up chamber perfectly fit with high quality 6,03 precision barrel. The use of precision barrel has a positive effect on the range and accuracy of the replica.

Length: 750mm - 840mm (Adjustable)
Weight: 2345g
Inner Barrel: TBA
Magazine Capacity: TBA
Muzzle Velocity: 310~380 FPS (Measured with 0.20g BBs)
Thread Direction: 14mm Negative
Gearbox: Ver 2 Metal, Fully Upgradeable
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety
Battery: 7.4v / 11.1v Buffer Tube LiPo Battery Recommended (Wired to rear w/ small Tamiya connector. Battery and Charger not included. We recommend using only high quality batteries and smart chargers)
Hopup: Yes, Adjustable
Package Includes: Gun, Magazine, Manual

Manufacturer: Specna Arms

About Specna Arms

Specna Arms is a brand manufactured in Hong Kong. Our aim is to deliver high-quality, good-looking and reasonably-priced Airsoft replicas. We are constantly developing both technical and visual aspects of our products to offer our customers the best airsoft experience.

15 Customer Reviews

(Write a review)

by Gabriel R. on 08/20/2021
"I’ve been researching for a _$200 AEG for a while and finally landed on the Specna Arms Core series. I purchased the C011 and it has been great for me. I have yet to field it, but I have fired at least a 1000 bbs and it has done well. Now to the pros and cons.

-Metal hand guard
-Metal Mock Supressor
-Pretty good rate of fire
-Mine came with an X-ASR mosfet (I’ve heard some dont, but I’m not sure)
-Can hit a human sized target pretty consistently from 130-150 feet
-Not heavy

- High cap magazine would stop feeding after 3-5 shots and was very wobbly (easy fix with a bit of electrical tape wrapped around it)
-Loud like a nail gun (can be a pro)
-May have to purchase other mags preferably mid caps like I did

Overall, great aeg and I hope to field it soon!
by Daniel G. on 07/18/2021
"I did a lot of research looking into budget aegs and ended up purchasing this in the sa-co9 model. I was not disappointed and would highly recommend.

The rifles performance is not exceptional but feels clean and tight. very good quality internals Make this an ideal aeg to upgrade as you see fit. I was also surprised when my rifle arrived and I found a mosfet in the battery compartment.

Externally the rifle is extremely well made. I am a fan of plastic replicas but finding a good quality plastic can be tricky. This is the best I've seen by far. Thick durable plastic much like a g&g for most of the construction. Fiberglass infused polymer body looks and feels firearm grade and aluminum for grip adds a nice feel. This is not an abs replica and I would say it's even a step above nylon polymer. the rifle is a very good weight and feels solid and tight.

Over all what attracted me to the specna core was the emphasis on quality and durability. Again on receiving and playing with the rifle I was not disappointed. This is a high quality and a very affordable replica packed with surprisingly premium features.
by David G. on 04/16/2021
"Perfect rifle for a beginner I got the Sa - C09 and it's one of the best gun I currently own

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