The bore of this barrel is so tight around the BB that even the smallest obstruction in the barrel will cause a jam when fired. This barrel is recommended ONLY for advanced/experienced players that take the responsibility to clean their barrels regularly in order to avoid jams.
Airsoft GI recommends cleaning this barrel after every day of use.
It looks like a coated brass barrel, is OK.
-slight improvement oiver the stock barrel.
-Has too many burrs inside of the barrel, caused my BB's to not shoot until a thourough cleaning.
-not much better than the PE 6.03, I'd much rather that they just make those in a 6.01
-hop-up window has been reported as too narrow.