s-trigger

S-trigger for Tokyo Marui VSR-10 The main characteristics Durable, robust 90° design prepared for strongest upgrades Preserved safety function Adjustable trigger stroke DROP-IN ( no modification needed to gun or trigger guard ) Optimized trigger pull ( around 0,5 lb ) Versatility ( TM...

So i am going to order an S trigger as Pavol has one in stock. The problem I run into is that they well reviewed Piston from Ranger is nearly impossible to find. Has anybody else had any luck with other pistons? Thoughts on what mods are needed to make them work?