SA-B12 KeyMod 8" SAEC™ System carbine replica

  • Li-Po battery in the set
  • Made of: ZnAl + steel+ plastic
  • Length: 700-785mm
  • Weight: 2490g
  • Colour: black
  • Muzzle velocity: ~430 / ~310 FPS
  • Quick spring exchange system SAEC™
  • Manufacturer: Specna Arms

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SA-B12 KeyMod 8" SAEC™ System carbine replica
Manufacturer: Specna Arms
Product code: SPE-01-011985
Small quantity of stock
Ready to ship in 3days
Cost from €1,73
282.25 / 1pcs
In stock
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SA-B12 KeyMod 8" SAEC™ System carbine replica

The set includes a Li-Po battery

SA-B14 by Specna Arms was mostly made from an alloy of zinc and aluminum with several steel elements placed in the most troublesome spots of the replica (pins, screws and tactical sling swivels). The SF type stock, which stores a battery, as well as the pistol grip were made from polymer. The body of the replica has undergone a process of anodizing, which guarantees a high level of protection against corrosion. The paint job was conducted by powder coating, after the surface has been sandblasted beforehand. Such a way of applying the paint provides a higher than usual paint resistance against abrasion. The body bears USMC markings.

All parts of the replica fit very well together – a standard so high that so far it could only be observed solely in replicas from such well-known brands as G&P or Classic Army – and it is exceptionally well balanced. All that makes this replica highly maneuverable and its weight is practically imperceptible when put against the shoulder.

The replica is equipped with the new generation of quick spring exchange system SAEC. It makes it possible to adjust the muzzle velocity to the current conditions without any additional tools of workshop. The process of exchanging the spring is even faster than in the previous version of the system.

Thanks to SAEC system there is no need to take the gearbox out of the replica - removing the stock guide (without any additional tools) and unsrewing the special pin with the ball-guide bearing. We exchange the main spring, screw the pin back, install the stock and... We are ready to play further! The whole operations took us just a moment. Let's underline the fact that you do not need any tools!

It's hard to mention all the benefits of using the replica equipped with SAEC system. Nowadays, nearly the whole Europe have to observe the regulations concerning the muzzle velocity limit. Moreover, there are also internal limits on the playing fields. SAEC gives the user a lot of options of adaptation. Now you can adjust the muzzle velocity, so everyone is safe and your replica still shoots effectively. It takes really just a few seconds.

The replica is fully compatible with LiPo and LiFe batteries. Stock muzzle velocity of ~430 FPS is guaranteed by the default main spring, which allows this replica to perform well on medium distance. The set includes a M90 spring, which allows to reduce the muzzle velocity to ~310 FPS, thus adapting the replica to use in close quarters and indoors.
A gearbox with reinforced piston head holds a steel spring slide, which is a part of SAEC™ system and 8mm ball bearings mounted steel gears. The system is safeguarded by four anti-reversal latches. A lightweight, polycarbonate piston was equipped with the set of steel teeth in order to increase its durability. Other implemented parts include: a type 2 cylinder, steel circuit breaker and metal hop-up chamber.

The replica has a top, 22mm, RIS rail and an adjustable stock. The top RIS rail features flip-up iron sights, which can be easily detached and replaced with any optical sight. A collapsible stock with an anti-slip texture stockpad allows the user to adjust the length of the replica to his/her body type and preferences. A standard flash hider is mounted on a 14mm, left-hand thread, which allows for its replacement with a silencer.

This model features a modular, KeyMod handguard. The KeyMod module can be expanded upon with dedicated segments, for instance, RIS rails(KeyMod nuts) in any position or configuration due to holes around the handguard (KeyMod slots).

It is an airsoft replica of a KeyMod handguard, its size may vary from original. We do not guarantee full compatibility of KeyMod handguard with dedicated KeyMod accessories.

In order to increase the realism, the replica has an operational bolt release mechanism.

he replica comes with a steel, hi-cap magazine with a capacity of up to 300 BBs. The magazine’s paint colour corresponds to the colour theme of magazine for live firearms usually used by military.

The SAEC System™ is covered by European Patent number: 002639500

Additional accessories from the photos are not included in the set.

The set includes:

- replica
- magazine
- battery
- mechanical aiming devices
- additional main spring
- set of KeyMod RIS rails


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:
- Lead
- Mercury
- Cadm
- Hexavalent chromium
- Polybrominated biphenyls
- Polybrominated diphenyl ether
- Bis(20ethylhexyl) phthalate
- Butyl benzyl phthalate
- Dibutyl phthalate
- Diisobutyl phthalate

Tech specs:
SA-B12 KeyMod 8" SAEC™ System carbine replica
Specna Arms
12 months
Velocity [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

~430 / ~310
Propulsion / Powered by:
Type of fire:
Single, auto
Lenght [mm]:

The length of the replca is measured between the two most distant points of each other. Different models have several of these values, because of its design allows to increase or decrease it length (eg.  folding stock or extended flash hider).

Inner barrel length [mm]:
Weight [g]:

This is a value that includes the weight of the replica, magazine and other accessories that are include in set without a battery, charger, cleaning rod, etc., etc.

Magazine type:
Hi-Cap magazine

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).

Yes, adjustable
Blow Back:

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.

Gearbox version:

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
Magazine capacity [pcs]:
Made of:
Metal + plastic + steel
Battery included:

NiCd 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.
NiMH batteries have a higher self-discharge over time and shorten the life - on the other hand, they earn about 30% more capacity.

Battery Voltage [V]:
Battery Capacity [mAh]:

Battery capacity determines the time, which it accumulated enough energy to work gearbox. The greater  capacity, then replica will shoot longer.

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