The P-51B/C and early batches of the P-51D were fitted with the N-9 gunsight unit. Now, CMK offer you a cast resin replica of this gunsight that feature very fine levels of detail. Although the gunsight was designed to fit the new Revell P-51D kit, it can be used with other kits as well as the original unit was often found, besides the Mustang, also in the A-26, P-63 and some of the F-84F and F-86D.