Airsoft rifle M4 SD Sportline BI-TON (Gen.2) - BK-TAN

This Lancer Tactical M4 is, due to its low weight and price, especially suited to beginner players, but it will also be appreciated by the more experienced players due to its quality and performance.

The gun contains a metal piston for better durability and a 6.03 mm precision barrel with a ProWin style hop-up chamber for optimal range and fine adjustment. The weapon also has a popular quick change spring system - QSC. Changing the spring is a matter of a few minutes. Stock gun comes with the M100 spring inside, which is suitable for CQB skirmish. For more demanding players, there is also a M120 spring included in the packing

• Body and handguard of lightweight polymer
• External Barrel made of metal
• Polymer silencer
• RIS type handguard
• Detachable, foldable sights
• Retractable adjustable stock
• Lancer Tactical laser logo
• Own Serial Number
• Performance 100 m/s  / 120 m/s
• Piston with metal tooths
• 8 mm metal bearings
• The QSC system

• Metal Hi-Capacity magazine
• Extra spring M120
• High quality battery 9.6 V
• Simple Charger
• Lancer Tactical PVC patch

Quick spring change system

The gearbox and the replica body have QSC system - spring change takes few minutes. The QSC system (the quick spring change system), means that the spring guide can be removed from the gearbox without removing the gearbox from the body. There are locks on the head of the spring guide and the holes in the gearbox. By turning the spring guide, the spring guide and spring can be removed. This weapon has also a QSC system on the body - no need to remove the gearbox from the body - just remove the stock and unscrew the stock tube.

Cylinder and piston

The cylinder is polished for smooth piston action and increased performance.
The piston has a metal tooth for maximum durability with stronger springs. The piston head is plastic with rubber compound, for a softer and lighter stop and longer life.

Gears

Metal gears have a straight tooth that reduces axial forces. The piston gear is equiped with a BB supply cam for smooth BBs supply from magazine, even on high rate of fire.