Introduction: Semi Automatic Knex Pistol
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About: I like mountain biking, its my main sport and i own 2 bikes so anything to do with bikes interests me, i also used to make K'nex guns but have since retired...to making instructables about games and other thin…
this is it! the first ever true trigger semi automatic bottom loading magazine pistol.i was playing around with different mechanisims of how to make a semi auto like having the trigger pull back the ram but this did not work so i moved on to a multiple rubberband system and how a rbg could be adapted and this is what i found...
Step 1: What You Will Need...
this is what you will need...
Step 2: Start Building With the Handle
we will start at the back of the gun and work to the front :)
1:make 2 of these
2:make this
3-5:connect them together
1:make 2 of these
2:make this
3-5:connect them together
Step 3: Make the Rubberband Mech
1:build 1 of these (they are A)
2:build 2 of these (this is part B)
3:build 1 of these (this is part E)
4:build 3 of these (this is part C)
5:build this(this is part D)
6:take 1 part C and do this
7:take part B and connect it to part D like this
8:take another part B and attach it to part B-D-C like this
9:finish it off
10:take another part C and do this
11:put it through there and through part B
12: then put it through part E
13: do this to another part C
14:put it through here
15:add part A and the spacers done!
2:build 2 of these (this is part B)
3:build 1 of these (this is part E)
4:build 3 of these (this is part C)
5:build this(this is part D)
6:take 1 part C and do this
7:take part B and connect it to part D like this
8:take another part B and attach it to part B-D-C like this
9:finish it off
10:take another part C and do this
11:put it through there and through part B
12: then put it through part E
13: do this to another part C
14:put it through here
15:add part A and the spacers done!
Step 4: Attach Handle and Start on Magazine Mech
now attach the handle and build the magazine mech
1-2: attach handle like this
3:build these
4:grab these parts
5:attach them like so
6:add it to the rubberband mech
7:make this
8:add these
9:add these
10:add this to the top
11:add a stub on a white rod to the top
1-2: attach handle like this
3:build these
4:grab these parts
5:attach them like so
6:add it to the rubberband mech
7:make this
8:add these
9:add these
10:add this to the top
11:add a stub on a white rod to the top
Step 5: Attach the Mini Scope and Start on the Forward Barrel
1-2:connect the magazine to the handle and rubberband mech like this
3:build these
4:connect them together with 2 yellow rods
5:connect that to the magazine with 2 green rods like this(note:black rods are also green rods :))
6:build these
7:connect them together
8-9:add these
10:connect to the top of the magazine
11:add side panels
12:connect 6 blue rods evenly
13:build these
14:connect them like this
15:build these
16:connect them like this
17:add this part
18:build these
19:add them like so
20:add this part to finish :D
3:build these
4:connect them together with 2 yellow rods
5:connect that to the magazine with 2 green rods like this(note:black rods are also green rods :))
6:build these
7:connect them together
8-9:add these
10:connect to the top of the magazine
11:add side panels
12:connect 6 blue rods evenly
13:build these
14:connect them like this
15:build these
16:connect them like this
17:add this part
18:build these
19:add them like so
20:add this part to finish :D
Step 6: How to Prime the Gun and Firing
1:build this and insert it into the bottom of the magazine(it is the multirod)
2:attach rubberband from here
3:to here!
4:grab the 7 rubberbands
5:clip them into here
6:grab your ammo! (7 green rods)
7-9:grab your multirod and pullback each band with it,thread it under the scope and hook it on the toothed wheel at the back of the gun
10:all rubberbands cocked
11:pop the multirod into this stub(sorry i didnt include the stub earlier add it now) and pop the rubberband back on it
12:push the scope down
13:load the ammo
14:replace the multirod
15:pull the scope back up
16:happy shooting i hope you enjoyed this instructable and will have fun with this gun goodbye!
2:attach rubberband from here
3:to here!
4:grab the 7 rubberbands
5:clip them into here
6:grab your ammo! (7 green rods)
7-9:grab your multirod and pullback each band with it,thread it under the scope and hook it on the toothed wheel at the back of the gun
10:all rubberbands cocked
11:pop the multirod into this stub(sorry i didnt include the stub earlier add it now) and pop the rubberband back on it
12:push the scope down
13:load the ammo
14:replace the multirod
15:pull the scope back up
16:happy shooting i hope you enjoyed this instructable and will have fun with this gun goodbye!