While I do not have a new Marauder (mine is a gen 1), I've had 3 different .177 cal Crosman barrels on mine, the last was a supposedly improved barrel. I had high hopes, but it was as mediocre as the first two. I bought a LW barrel (my fourth barrel on this gun) and it is simply far and away the better barrel (though 3x the cost). I bought a new Crosman barrel for another gun earlier this year and it was defective as well, with a score running the length of it that looked like someone ran a plow down the inside right through the lands and grooves. I won't buy another barrel from Crosman and if I do buy another Crosman gun, the first thing I will do is throw the barrel away and get a Lothar Walther for it. Just my experience.