Advanced kit technical information set:
What is this kit made of?
- Gas spring (Ram gas)
- Piston (plunger)
- Piston retainer (PU seal)
- Teflon O-ring (sectioned) - Rear centerer
 
What benefits and results do I get by installing this kit on my airgun?
- Use scope / holographic sights
- Less vibration
- Tuning capacity
- Shooting accuracy
- Comfort when cocking and less recoil when firing
- Airgun life, less friction between internal parts
- Decreased Lock Time
- Better alignment between parts
- Ease of installation
- Makes the airgun quieter

What benefits will this kit bring to the shooter?
- Possibility to evolve in sport
- Shooting comfort
-confidence gain
- Easy to cock
 
Technical characteristics of each kit part:
Piston (plunger):
The Elite Airguns relieved rotary piston (plunger). In it the GasRam (GR) is mounted with the rod inside the piston. This form of assembly is the traditional way of assembling the kit.
The Advanced Kit proved to be more efficient for airguns where the cylinders (air chamber) have diameters of 28, 29, 30mm. The addition of the Teflon o-ring at the rear of the plunger prevents friction between metal and metal, reducing vibration when the plunger hits the end of the airgun compression chamber with each shot, improving its performance. It provides the ideal balance between reduction of recoil and vibration, and the airgun reaches constant and stable firing levels.
 
Piston retainer (PU seal)
Elite Airguns PU seals are produced in polyurethane (PU). They improve the sealing, provide  more stable shots, with less speed variation between shots (Spread). Our PU seals are compatible with original plungers and Elite Airguns plungers.
 
Gas spring (GasRam)
A gas spring is a pneumatic spring similar to a shock absorber. It consists of a steel tube with nitrogen under pressure, and a massive rod, which when entering the tube meets resistance to nitrogen pressure When the gun is cocked, the GasRam rod is pushed into the tube and consequently increases the pressure inside the tube, storing potential energy and acts as a pneumatic accumulator. The advantages of the gas spring are the capacity to keep the gun cocked and ready to fire for long periods of time without spring fatigue, no torsional torque (caused by the expansion of the coil spring) that is exerted on the gun, recoil pattern smoother and faster lock time (the time between the trigger activation and the lead exit from the airgun barrel), resulting in more consistent shooting accuracy. Gas springs perform more reliably in cold climates, as the grease used to lubricate coil springs tends to thicken at low temperatures, making it difficult for the gun to function. Gas springs also have less lateral and longitudinal vibrations than helical springs, so they are generally less sensitive when compressed, making it easier to obtain consistent groupings of shots.
 
Centralizer:
It is the part responsible for aligning the Gas Ram between the other parts.
 
Lubricant:
Product used to lubricate the piston retainer (PU seal), responsible for sealing and compressing the air that will propel the projectile.
 
Dimensions:
- Piston:
Length: 250mm
Diameter: 29,4mm
Weight: 223g
 
- GasRam:
Length: 321mm
Diameter: 18.2mm
Weight: 169g

- Total kit weight: 411g
- Total length of the kit: 344mm
 
 
The Hatsan 125 Advanced Kit fits the following airgun models: 125, 125 Sniper and 125 TH.The Advanced Kit package includes:- Gas Spring (GAS RAM)- P.U. Seal- Piston- O'ring- Teflon ring- Back Centralizer- Molybdenum Bisulphide Grease