These M-LOKŪ Accessory Rails are precision machined to 1913 Picatinny spec to allow mounted accessories a seamless attachment to the handguard. All rails are designed per M-LOK spec and feature a beveled end to provide a smooth transition to the handguard. Accessory Rails include all necessary hardware for mounting to M-LOK slots. Features include a 4-Slot Picatinny Rail made from 6061-T6 Aluminum with Type III Mil-Spec hard coat anodizing. Available in black only. Overall Length: 2.625" Weight: 0.68 oz. Made in the USA by Samson Manufacturing.