@@wyz2285 Mine looked very similar to the Mastermods barrels and had the same size window, and very similar external surface finish. Not saying they are, but they were made in either China or Taiwan, which happens to be where parts for companies like ICS are made.
@@SiliconeSword Mastermods window is different than any other barrel and certainly isn't the same as AP, AP has 7mm length square cut window, Mastermods has this weird cut.
