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 Acti
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