Notes Additional Physical Form: Also available on microfilm from the Library of Congress, Photoduplication Service. Additional Physical Form: Electronic reproduction of copy from George A. Smathers Libraries, University of Florida also available. MWS barrels utilize a low profile gas block and straight gas tube. They possess proprietary coating and are cryogenically treated for long term durability. The MARS-H ambidextrous lower receiver features our EDM machined two-stage trigger, winter trigger guard, endplate with QD swivel point, LMT ergonomic textured grip, and DMR stock. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000. 62000 ... Aug 15, 2018 · I say this as an owner of an LMT MWS and an MRP – monolithic uppers are a good concept, but not really necessary for the AR15 platform. However, one specific instance where a monolithic upper has an advantage is with a rail mounted laser/illuminator for nvg use. The MARS 308 MWS lower receiver features LMT® ergonomic textured grip, ambidextrous bolt catch, ambidextrous magazine catch, safety selector and SOPMOD stock.