User blog comment:123BC/Oliver's arrows/@comment-27673963-20171019151832

There are 2 possibilities

1. Oliver has a phome substance or something similar at the bottom of his quiver so his arrows are held in place, don't wriggle around and can come out easily.

2. The writers didn't think of this and only realised their mistake after it was too late

P.S. Felicity sucks (That was for Ninja72)