Born from the collaboration with a company for 30 years leader in the D100 spring it is made of steel industry Pre-hardened variable pitch.

The abbreviation stands 100 the speed in m / s reached by bullets from 0,20gr.

Calibrated on a replica with inner-barrel by 6.08 and 220mm in length, using a cylinder type A (for 180 to 250 mm rods) with a perfect closing between push ball and grommet hop up and without bearings or thicknesses it on the head piston it on the spring guide.

The step of the study, the final length and its realization makes the skin soft spring in the compression phase and the fast release, ideal for mechanical high speed.

Construction features:

• Steel Pre-hardened;
• 400 ° Stabilization
• End adjusted and self-centering
• Treatment peening (improves the surface residual stress distribution of the treated piece by increasing the resistance to fatigue).
• final stabilization at 200 °