7mm upgrade spring for sniper rifles – M160 (525 FPS)

<p>Spring for airsoft sniper rifles. It is made of spring steel with proper heat treatment and gives the final output of about 160 m/s (525 FPS). The spring has an inner diameter of about 7.5 mm and an outer diameter of 10.2 mm. The length is 251mm.</p>
<p>It is therefore dimensionally suitable for most plastic basic pistons</p>