M4 Core SA-C01 Bi-Tone (Specna Arms)

Equipped as standard with a 6.03mm presion barrel, the ESA system for quick spring change. The body, stock & grip are in Nylon Fiber. The outer barrel, the flash hider, the sight are made of metal. The replica develops a basic power of approximately 380 Fps as standard. It is also supplied with an M90 spring for CQB environments with a power of 310 Fps if necessary. A range of replicas with an affordable price and surprising performance!!!

The replica includes an ESA ™ spring quick change system. Thanks to this system, it is possible to quickly adapt the power of the replica to the conditions expected on the playing field without the need to have access to a workshop or a set of special tools - it is enough to remove the tube stock to access the spring so that it can be removed without having to remove or disassemble the gearbox.

The replica is fully compatible with LiPo and LiFe batteries. With a basic power of around 380 Fps provided by the main spring installed by default by the manufacturer, the replica is perfect for running in the standards. The set also includes an M90 spring, which allows the initial speed to be reduced to approximately 310 Fps or 1 Joule and, therefore, to adapt the replica for short-range and indoor operations (CQB).

The geabox contains 8mm bearings (bushing) as well as steel gears. The polycarbonate piston is equipped with steel teeth, in order to increase its durability. A type 0 cylinder and a steel contactor have also been implemented, as well as a precise rotating Hop-Up chamber. The durability of the parts allows the use of springs up to M140.

The high-precision rotating Hop-Up chamber perfectly fits the 6.03mm precision barrel. The use of a precision barrel has a positive effect on the range and accuracy of the replica.

The replica is equipped with a 22 mm upper RIS rail (Airsoft standard) and an adjustable stock. The upper RIS rail has a rear sight. Thanks to the extendable stock equipped with a non-slip grip, it is possible to adapt the length of the replica to the type of body and the preferences of the user. A standard flash hider is based on a 14mm left-hand thread, which allows a silencer to be fitted in its place.

The set includes:

- replica
- charger
- metal sight
- additional main spring