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Knex Sub-Machine Gun "The SMG3"by KnexFreak360
Model K'nex Sub Machine Gun (SMG)by Spycrab
K'NEX MSMCby The Red Book of Westmarch
Knex Sub Machine Gunby Carrot187
First k'nex gun(with hopper)by Spycrab
knex modded smgby knex dude 2000
knex scorpion (smg) with detachable magby KNEX GUN BIULDER
Knex Magpul FMG-9 (Foldable Machine Gun)by verypoopy
K'nex - Peacekeeper Instructionsby Zombiekiller-93
The Knex Thompson Sub Machine Gun (SMG)by TheEliminatorX
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