Prometheus EG Stainless Steel 6.03mm Inner Barrel (141mm - 550mm) MSR-011 safe on plastics

safe on plastics

-Slide releases

Magazine: 120rd Midcap

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Prometheus EG Stainless Steel 6.03mm Inner Barrel (141mm - 550mm) MSR-011 safe on plasticsPrometheus is a high end brand manufacturer of aftermarket parts with a special focus on enhanced performance. Their inner barrels are well established as being a top tier choice for tight bore inner barrels. With an inner diameter of 6. 03mm, it is a tighter fit on ammo then most stock varieties (which are in the 6. 05+ range mostly) but still not as tight as 02 or 01 barrels making them easier to work with. 6. 03mm is generally considered the sweet