A composite stringer assembly, comprising: a plurality of composite stringers axially aligned with each other along a longitudinal axis of the plurality of composite stringers, wherein each composite stringer (920A, 920B) comprises: a skin flange configured to be coupled to a support structure, wherein the support structure comprises at least one of a skin of a vehicle or a base charge; a web; a top flange (926A, 926B); a lower corner portion extending from the skin flange to the web; an upper corner portion extending from the web to the top flange (926A, 926B); an inner surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B); and an outer surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B), wherein at the lower corner portion the outer surface is defined by a first radius of curvature; and a radius filler comprising: a first surface coupled to the inner surface at the lower corner portion of each composite stringer (920A, 920B), a second surface configured to couple to the support structure, and a third surface extending between the first surface and the second surface, wherein the first surface of the radius filler is defined by a second radius of curvature, wherein the top flange (926A, 926B) of a first composite stringer of the plurality of composite stringers has a gage that is different than a gage of the top flange (926A, 926B) of a second composite stringer of the plurality of composite stringers, and wherein, along the longitudinal axis: (i) the composite stringer assembly has a total length that is equal to a sum of a respective length of each composite stringer (920A, 920B), (ii) the first radius of curvature is constant or substantially constant over the total length of the composite stringer assembly, and (iii) the second radius of curvature is constant or substantially constant over the total length of the composite stringer assembly. a plurality of composite stringers axially aligned with each other along a longitudinal axis of the plurality of composite stringers, wherein each composite stringer (920A, 920B) comprises: a skin flange configured to be coupled to a support structure, wherein the support structure comprises at least one of a skin of a vehicle or a base charge; a web; a top flange (926A, 926B); a lower corner portion extending from the skin flange to the web; an upper corner portion extending from the web to the top flange (926A, 926B); an inner surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B); and an outer surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B), wherein at the lower corner portion the outer surface is defined by a first radius of curvature; and a skin flange configured to be coupled to a support structure, wherein the support structure comprises at least one of a skin of a vehicle or a base charge; a web; a top flange (926A, 926B); a lower corner portion extending from the skin flange to the web; an upper corner portion extending from the web to the top flange (926A, 926B); an inner surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B); and an outer surface extending along the skin flange, the lower corner portion, the web, the upper corner portion, and the top flange (926A, 926B), wherein at the lower corner portion the outer surface is defined by a first radius of curvature; and a radius filler comprising: a first surface coupled to the inner surface at the lower corner portion of each composite stringer (920A, 920B), a second surface configured to couple to the support structure, and a third surface extending between the first surface and the second surface, wherein the first surface of the radius filler is defined by a second radius of curvature, a first surface coupled to the inner surface at the lower corner portion of each composite stringer (920A, 920B), a second surface configured to couple to the support structure, and a third surface extending between the first surface and the second surface, wherein the first surface of the radius filler is defined by a second radius of curvature, wherein the top flange (926A, 926B) of a first composite stringer of the plurality of composite stringers has a gage that is different than a gage of the top flange (926A, 926B) of a second composite stringer of the plurality of composite stringers, and wherein, along the longitudinal axis: (i) the composite stringer assembly has a total length that is equal to a sum of a respective length of each composite stringer (920A, 920B), (ii) the first radius of curvature is constant or substantially constant over the total length of the composite stringer assembly, and (iii) the second radius of curvature is constant or substantially constant over the total length of the composite stringer assembly. (i) the composite stringer assembly has a total length that is equal to a sum of a respective length of each composite stringer (920A, 920B), (ii) the first radius of curvature is constant or substantially constant over the total length of the composite stringer assembly, and (iii) the second radius of curvature is constant or substantially constant over the total length of the composite stringer assembly.