Samson SXS 762H Series 12 in MLOK Handguard for Armalite Black. 308 rifle? Bigger calibers shouldn't require bigger rails. For .308/7.62 rifleowners looking for a fast-handling easy to grasp accessory rail the Samson SXS-762 Series free-floating M-LOK system is the perfect AR.308 upgrade. Its sleek profile creates a comfortable feel to a wide range of shooters regardless of your application. The SXS system creates a solid extension of the upper receiver with the benefits of rapid and easy installation thanks to the pre-installed captured clamping system and Samson barrel nut. SXS-762L: LR308 pattern receiver with DPMS thread pattern barrel nut (1 7/16" - 16). Fits LR308 pattern height receivers. SXS-762H: Armalite AR10 and DPMS "High" receivers with DPMS thread pattern barrel nut (1 7/16" - 16). Fits AR-10 height receivers. Specifications for Samson SXS 762 Series M-LOK Handguard: Manufacturer: Samson Color: Black Condition: New Package Contents: Samson SXS 762 Series M-LOK Handguard Hex wrench barrel nut and barrel nut wrench. Samson 01-06071-01: SXS 762H Series 12 in MLOK Handguard for Armalite Black