If it sticks, gently tap on it with a soft-faced hammer until it slides off the barrel. Remove the original front sight gas block assembly from the barrel. If the gas block is a clamp-on type, use a hex key to loosen the set screws. Sometimes applying light heat to the area also helps with removal. If the pins are difficult to remove, apply penetrating oil, let sit overnight and try again. If unsure, measure the pin diameter on each side first. If it has tapered pins, drive them out with a cup tip punch from the small side. Tap out the gas tube roll pin with a #2 roll pin punch and inspect the front sight gas block. Clamp the upper receiver into a vise using a vise block and remove the flash hider and crush washer. Separate the upper and lower receivers and remove the bolt carrier group and charging handle. First, remove the original handguards using a handguard removal tool. Make sure you have all the right tools and parts on hand for disassembly and reassembly before starting work.Īs always, before working on any firearm make sure it’s unloaded and safe to handle. Most standard front sight gas blocks are held onto the barrel by either tapered pins or by clamps. When planning your free-float project, take a close look at the type of gas system currently on your rifle.
#DPMS ORACLE RAILS ON DIFFERENT PLANE INSTALL#
What do I need to install a free float quad rail handguard? A direct impingement LR-308 can never be truly “free-floated” due to the attachment of the gas block and gas tube, but the addition of a quad rail or other free float style handguard can help with accuracy and also provides a stable and convenient platform for attaching bipods, lights, grips and other accessories. The traditional LR-308 configuration has the sling mount attachment at the base of the front sight gas block, so moderate changes in sling tension can change the point of impact downrange. One of the main benefits to free-floating a DPMS LR-308 is an increase in accuracy from reduced variability in the barrel harmonics due to sling tension. View our 308 compatibility guide for more details. Before purchasing a handguard, please make sure you are purchasing the correct one. Does your 308 rifle use a DPMS LR-308 pattern barrel nut and handguard?ĪR/LR 308 style rifles use several different barrel nut and handguard standards, depending on the make and model.