May 31, 201610 yr Hi Guys Does anyone know what the markings represent on the top of the barrels. Cheers
June 1, 201610 yr Some of them are stamped with model number of the first model that used that design of barrel. An example of that are my M49 barrels that are stamped 27. M27 is the first model 5 speed Sherpa T and M49 is the second model
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