GR4 100Y PBB carbine replica – BLACK

  • Made of: metal and plastic
  • Weight: 2920g
  • Length: 520 / 770 mm
  • Muzzle velocity: ~320 FPS
  • Powered by: a battery
  • Magazine capacity: 300 BB pellets
  • Manufacturer: G&G

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GR4 100Y PBB carbine replica – BLACK
Manufacturer: G&G
Product code: GIG-01-002359
Very small quantity of stock
Ready to ship in 1days
Cost from €1,66
257.27 / 1pcs
In stock
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    GR4 100Y BB carbine replica 

The GR4 100Y BB carbine replica made by the G&G company is made within the Combat Machine project which aim was to deliver a high class replica in the price that you could call economical. The Combat Machine replicas characterized themselves with the highest quality of make, high operating culture and the high quality of the materials used – what is very characteristic for the G&G company. The main factor allowing to lower the price is the use of the body and the front grip that were made of high quality plastic instead of metal. It is also significant that the body itself is made of plastic that was reinforced with fiberglass – just like the front grip, the stock and almost every plastic element. The iron aiming sights, the magazine, the stock and the cocking handle were made of metal. The shape of the piston grip is almost identical to the real firearm’s pistol grip.


The front grip is equipped with RIS rails and the top rail in a one piece rail that is integrated with the body of the replica. Thanks to this the user has got a 340mm long RIS rail. There are iron aiming sights mounted on the top rail – a classical front and rear iron aiming sight.


The replica was made in black color. It is perfect for fighting on short and middle distances due to the use of the M100 main spring that guarantees the muzzle velocity of about 310-320 FPS. The use of single top RIS rail allows for the attachment of any given optical aiming device. Moreover, thanks to the complete RIS rail system that is located in the place of the front grip it is possible to attach additional gear such as a tactical grip, a flashlight, a laser target marker and so on…


An extraordinary Blow-Back system, known from the Top Tech replica ( the more “professional” and what follows it – the more expensive G&G line ), provides additional realism for the user of the replica and ensures additional experiences for the user himself.


The Pneumatic Blow-Back system operates on the principal of taking a part of the compressed air from the gearbox to a special cylinder that is located above the gearbox’s casing. The small piston that is located in the Pneumatic Blow-Back system moves a thin plate that is attached to it. The plate imitates the bolt carrier.


ATTENTION: The manufacturer does not recommend using batteries stronger than 8,4V due to the fact of the possibility of damaging the aforementioned plate.


The G&G replica’s that are equipped with the Pneumatic Blow-Back system have got a reinforced and modified V.2 gearbox. The modification that was made was the adaptation of the gearbox to the Pneumatic Blow-Back system and adding the “active main spring release” button in the form of the actuator.

     The set includes: 

- the replica,
- a magazine,

Tech specs:
Replika karabinka GR4 100Y PBB
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

Propulsion / Powered by:
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.

v2 Gearbox
Type of fire:
Single, auto
Made of:
Metal + plastic
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).

520 / 770
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
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).

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.

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