Specna Arms SA-B04 ONE

Specna Arms SA-B04 carbine replica

The Specna Arms brand SA-B04 carbine replica made predominantly of an homogenous alloy of zinc and aluminium with the use of some steel elements. The replica’s body, the RIS rail set were a subject to the process of anodizing which guaranties a high level of protection against corrosion and abrasion..

The replica uses a quick main spring exchange system, the so-called Enter & Convert™. This allows for a quick and fluent adaptation of the replica’s power to the conditions of the battlefield without the need of having access to a workshop or a number of specialist tools – when you take the gearbox out the replica’s body, the process of exchanging the main spring takes literally seconds.

The advantages of the Enter & Convert™ system are hard to overestimate. In the light of the laws existing in Europe and which limit the muzzle velocity of the replica and the establishments inside the airsoft society, this system guaranties the user great possibilities and more liberty. The Enter & Convert™ system allows to change the main spring in little amount of time, and, what is followed by this, adapted the muzzle velocity of the replica to the battlefield so it guaranties a perfect compromise between effectiveness of firing and the safety of your own and other players.

The gearbox which is reinforced on the height of the cylinder’s head hides a steel main spring guide which is the element of the Enter & Convert™ system and also 8mm ball bearings and steel thread-wheels which are placed on spacers. There is a type 2 cylinder and the steel breaker.

What you Get?

The set also includes an M90 main spring which allows to decrease the muzzle velocity to about 310 FPS. This makes the replica perfectly adapted for short range operations or fighting inside buildings. PLEASE NOTE we will fit the M90 Spring to ensure compliance with UK Law.

The Upgraded Version is equipped with some new, improved internal parts:

– set of reinforced steel gears
– steel spring guide
– lightweight, polymer piston
– aluminium, sealed piston head
– metal cylinder head
– air seal metal nozzle