How To Upgrade a Tokyo Marui VSR-10 Pro Sniper Step by step. Video Timeline Index: Action Army Upgrade Parts Overview- 0:46 Removal of Stock/Trigger Unit/Cylinder- 3:30 Action Army Cylinder Installation- 6:31 Action Army Piston Installation- 7:17 Action Army M150 Spring Installation- 8:15 Action Army Cylinder Head Smoothing- 8:58 Removal Of Outer Barrel/ Inner Barrel/ Hop Unit/ Receiver- 12:05 Hop Unit Disassembly- 15:48 Hop Rubber (Bucking) Installation- 17:39 Action Army Hop Unit Installation- 18:42 Action Army Specialised Trigger Installation- 30:40 PDI Type R Trigger Guard Installation- 34:03 Front/ Rear Sight Removal- 37:03 Tokyo Marui VSR-10 Rail Installation- 39:47 Scope Mounting Notes- 41:20 Action Army M150 Spring Chrono Test- 44:40 Action Army M130 Spring Chrono Test- 46:10 Final Thoughts and Opinion- 49:45 Outtakes- 53:37 How To Remove Cylinder Head: https://www.youtube.com/watch?v=38aRAsXfMnE Thanks for watching! Hope this helps some one out there wishing to upgrade their VSR-10! ^^ Approximate price of upgrades: Action Army Specialised trigger- 165 USD Action Army 430mm 6.03 Tight bore Barrel- 53 USD Action Army Teflon Cylinder- 70 USD Action Army Perfect Hop-up Chamber- 55 US Action Army Spring Guide- 25 USD Action Army M150 Spring- 17 USD Tokyo Marui Scope Rail- 15 Total Cost so far approximately: 400 USD Other Mods unrelated to performance: R-Type trigger guard 58 USD Trigger Guard Screw 10 USD Bedding pillar 5 USD Don't forget to buy barrel spacers/ stabilisers too! This should be your first Mod