Knex M6A2 (the First on This Site!!!!)

this is a combination of an M4 and MP5. I don't know if I'm posting this. I'm going to ask you, Post or no Post? it gets about 35 ft. on one 64# rubberband.
https://www.instructables.com/id/knex_M6A2_the_first_on_this_site/
Credit to TheDunkis for the mag