This Is a new product for the Airsoft industry. The Spring-Tek  lets you measure a springs strength in relation to the spring you are replacing. Thus giving you a idea of the new springs out put. No more trial and error. 

Spring-Tek AEG Spring Analyzer

$63.00 Regular Price
$56.70Sale Price
  • The Spring Tec Introductory price is $49.50. Plus shipping, $7.20 for a total of $56.70.