Was doing some web searching and found this:

Book: Fred Ray’s Shock Troops of the Confederacy: The Sharpshooter Battalions of the Army of Northern Virginia (CFS Press, 2006)

Text: “ While this was going on, the Confederates of Waggaman’s Louisiana Brigade made an attack on Fort Haskell to the south, their sharpshooters out front. “

This text is found in Chap 20 of the book - Attack at Fort Steadman

Web: http://brettschulte.net/ACWBlog/archives/books_reviews/review_shock_troops_of_the_confeder_1.html

Based upon what has transpired on this thread, I must stand corrected, there appear to have been sharpshooters in or at least supporting the Louisiana Brigade at a variety of combat actions, at least the 1st Brigade, and the Consolidated Brigade.

JIM T