Basic M4 Maintenance Jun 14, 2009 4:28:17 GMT 8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by zero_sector™ on Jun 14, 2009 4:28:17 GMT 8 Basic Maintenance (Disassembly): www.mechbox.com/m4m16/m733-disassembly.htmlBasic Spring Upgrade: www.mechbox.com/mechbox/v2-mechbox-spring-upgrade.html