help with mesa picatinny and ar carry handle

[bearfutedninja]

im currently building a 870 tactical shotty. im unsure of what i want to do about a rear sight... im putting a mesa tactical 6 shot side saddle with a picatinny rail built on to it.. will anyone know if a carry handle off of a ar will fit on here. maybe if someone has an 870 and a ar with a carry handle i dont know how long it is maybe you could tell better by the pictures.

http://www.mesatactical.com/images/111.jpg

something like that

http://www.combathunting.com/79938256.jpg

thanks in advance