 The MAR has undergone several changes over time, and it is worth noting that it may also be found with a polymer-coated aluminum stock or an all-polymer stock.The Model 699 is available with a 267 mm barrel and optional left-side charging handle which is welded onto the left side of the bolt carrier and protrudes through a slot cut in the receiver cover that is covered by a spring-loaded cover while the bolt carrier is forward.The 7.62mm Galil Sniper (aka