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.

Keymod accessories torque specs