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This is my new knex gun the M4A1 Carbine Assault Rifle it's one of a kind it has a adjustable stock, a charging handle that pulls back the ...
K'nex M4A1 Carbineby Fartonia
Knex M4A1 Carbineby OrionPax43
Knex M4A1 Carbine (virsion from Fartonia's)by M4A1DrumRoll
knex m4a1 upgradeby josh thwaites
knex m18d rbg semi assault rifleby JDproductions
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