PWS Enhanced Buffer Tube - MOD 2 Material & Coating Impact extruded from 7075, the PWS EBT is optimized for strength and rigidity while creating a solid platform for the new lightened design. Anodized in Mil spec type 3 to exceed standards in hardness and corrosion protection. Ratchet-Lock Design The new Ratchet-Lock Design eliminates the need for staking the castle nut and gives a rock solid lock up while being able to remove it easily if needed in the future. Reduced Weight Additional lightening cuts reducing weight in conjunction with the new attachment design net nearly a 1oz weight reduction from already efficient mil spec buffer tube design. Anti-tilt Lip The anti-tilt lip enhances function and reliability, givinglonger life to piston driven weapons by allowing the carrier to start in the buffer tube rather than transitioning into the tube on extraction. Stock Featuring six stock positions with enhanced drainage ports for greater reliability regardless environment or application. QD Mounts The central QD sling swivel mount allows for neutral positioning of your firearm with multiple sling configurations. https://www.youtube.com/watch?v=DI5VpUTBw-I