JY MSR Enhanced Trigger & Gearbox SystemThe JY Remington MSR Enhanced trigger gearbox is the latest upgrade for your sniper to take it to the next level of performance. With an aluminium trigger and metal gearbox housing the internal springs are all built for a more powerful punch to send your gel balls flying through the air. This upgrade is a direct replacement and is done in under 10 minutes. Compatability JY MSR