Just got done putting on the vltor casv handguard and extension. I was damn tired of getting chewed up by the useless rails fn hung all over the gun. I also replaced the surefire flash hider with the new 7.62 mod1 bcm compensator/flashider. Weight empty 8lbs 9oz Weight with optic and full mag 11lbs 3oz Not too many semi auto 308 that come in at 11lbs empty and no sights or optic... Lower is a handle defense scar25 allowing me to use pmags. Optic is a trijicon accupoint tr24g on a adm qd scout mount. Trigger is a giesselle super scar. Buttstock is a vltor. Grip is a bcm gunfighter with magpul selector levers. If you get the casv system the screws that vltor sends with it are utter junk. Two stripped out under 20inch pounds. The six that hold the handguard on are over twice as long as needed so you can't tighten them with gouging your reciever. Learned it the hard way. Pretty upset about that. I had to use my bench grinder to remove half the length of the screws. I expected better qc from vltor. I'm going to have to hunt up some quality fasteners to replace the junk vltor sent. Other than the ****ty fasteners I really like the handguard and extension it feels a ton better than the midwest industries extension or the stock configuration. The handguards have two negatives. One it covers up the front sight windage screw. Be sure to zero before putting this on. Second you lose the oem front sling attachments. It covers them up but you get two qd sockets. To remove the barrel you have 14 screws to go through. All but 4 being the craptastic vltor fasteners your going to want a better set. Vltor also sends three different sizes for the hex heads... so while its a damn comfy handguard its shadowed by just simply terrible decision making in fasteners. Makes me wonder if vltor hired larue tactical for engineering decisions.