Quick view NCSTAR Ncstar Ar15 Riser, Nc Marfqv2 Ar15 3/4 Riser Qr Mnt $25.99 Ncstar's gen2 ar15 riser raises your picatinny rail platform by.75" which aids in getting low profile optic mounts to a more comfortable cheekrest height and shooting position.It mounts onto the picatinny rail of your ar15/m4 receiver by a locking quick... Compare Add to Cart