Specna Arms SA-B04 carbine replica
The Specna Arms brand SA-B04 carbine replica made predominantly of an homogenous alloy of zinc and aluminum with the use of steel elements in the most neuralgic points of the replica ( the screws, the pins and the tactical sling attachment points are made of steel ). The SF type stock which holds the battery and the pistol grip were made of polymer plastic. The replica’s body, the RIS rail set were a subject to the process of anodizing what guaranties a high level of protecting the replica against corrosion. The paintjob of the replica itself was made using the pulverization method after a previous sandblasting of the replica’s surface. This ensures the paint’s higher, than usually, durability against abrasion. The replica’s body beads the USMC markings.
The replica was fitted very well – in a way that it was previously observable only in the G&P or Classic Army class replicas. It was also perfectly balanced. This ensures a perfect maneuverability of the replica while as its weight is almost not felt when you place the replica on the shoulder.
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 replica was fully adapted to cooperate with LiPo and LiFe type batteries. Thanks to the basic muzzle velocity of about 410 FPS which is guaranteed by the default main spring, the replica is perfect to be used in middle distances. The set also includes an M90 main spring which allows to decrease the muzzle velocity to about 310 FPS making the replica perfectly adapted for short range operations or fighting inside buildings.
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. The system is secured with the use of four anti-reversals. The light, polycarbonate piston is equipped with a steel tooth in order to increase its durability. There is a type 2 cylinder and the steel breaker and a metal hop-up chamber applied in this replica.
The replica is equipped with a top 22mm RIS rail, a set of front 22mm RIS rails and an adjustable stock. The top RIS rail holds the flip-up type iron aiming sights which can be easily detached and replaced with any optical-electronic aiming devices. Thanks to the collapsible stock which is ended with a anti-skid stock’s foot, it is possible to adapt the replica’s length to the built and the preferences of the shooter. The default muzzle flash-hider is placed on a 14mm counter-clockwise thread what allows the attachment of a sound suppressor in its place.
In order to increase the realism level, the replica was equipped with a functional bolt catch lever.
The replica set also includes a steel hi-cap type magazine which holds 300 BB pellets.
Specna Arms replicas are compatible with most of the magazines available in the market, for instance with magazines of the following manufacturers:
- Airsoft Systems,
- King Arms,
What's especially interesting in this replica is the Kryptek Mandrake® camouflage printed onto it. It has been made using an incredibly precise method of applying paint to objects called a water transfer.
Note: The picture was presented a sample copy. Due to the irregularity of the applied camouflage, the actual look may vary slightly from shown in the picture.
The set includes:
- the replica,
- a magazine,
- the iron aiming sights,
- an additional main spring,
- a battery,
- a charger
According to report number HKGEC1600157401
This product is compliant with EU RoHS (Restriction of Hazardous Substances) Directive 2011/65/EU annex II, replacing Directive 2002/95/EC, concerning limiting the amount of hazardous substances in toys and electronics.
Which means that the Specna Arms brand is free of the following hazardous materials:
- Hexavalent chromium
- Polybrominated biphenyls
- Polybrominated diphenyl ether
- Bis(20ethylhexyl) phthalate
- Butyl benzyl phthalate
- Dibutyl phthalate
- Diisobutyl phthalate
Indications v2, v3, v6 does not mean the level of advance, but only shape of gearbox skeleton which was used and selected by the manufacturer depending on the capabilities of the body of the replica. For example, a models of the M4/M16 family, MP5, have a v2 gearbox, while the AK family have gearbox v3.
Modified v2 Gearbox
plastic + metal
|Battery capacity [mAh]|
Battery capacity determines the time, which it accumulated enough energy to work gearbox. The greater capacity, then replica will shoot longer.
|Inner barrel length [mm].|
rechargeable battery is characterized by high efficiency
current-carrying capacity, but there are disruptive effect on memory.
Should be unloaded and loaded in the full cycle, ie, it is recommended
to fully discharge, and after unloading must charge the battery
immediately without leaving it for a long time in a discharged state.
|Magazine capacity [pcs.]|
Hop-Up system is used for overclocking bb during the shot (putting it in rotation), through which, it extends its flight path. Acting laws of physics make that bb lift up, while the gravitational force take it down. Appropriate adjustment of Hop-Up, will compensate for these two factors, which result in long and straight flight for longer distance and be greater focus shot (to improve accuracy).
Blow back is a simulation system of the cocking lever - it imitates the work of it as the equivalent sharp. This system raises the realism and adds a lot more experience during shooting.
|Battery voltage [V]|
|Spring quick replacement system|
|Exit speed [FPS]|
It is the spped of bb, while its leaving the innerbarrel of replica. This speed is measured in FPS (Feet Per Second).
1 FPS = 0,3 m/s
1 J = 99 m/s
1 J = 326,7 FPS