Introduction: Knex Button Activated Grenade Launcher

Picture of Knex Button Activated Grenade Launcher

This does NOT use a block trigger.
Ranges:10 to 15 feet
Can be mounted on any gun.

Step 1: Parts

Picture of Parts

Vary small amount needed
no rare pieces

Step 2: Ram and Trigger

Picture of Ram and Trigger

Make both

Step 3: Barrel

Picture of Barrel


Step 4: Assmembly

Picture of Assmembly

Picture is for right handed people.
If your lefthanded put the black piece on the other side.

Step 5: Rubberbanding

Picture of Rubberbanding

Add rubber band

Step 6: Firing

Picture of Firing

When you pull back the ram the trigger will slip into place.
Then push it in to fire.


fobblewabble (author)2008-12-16

technically every gun on sight is block trigger because every gun has something to block the firing pin

maxxxem (author)fobblewabble2008-12-16

not all of them

iKill (author)maxxxem2008-12-16

ya your completely wrong, there are plenty of guns that use whats known as a sear system which is the complete opposite. oh ya and has anyone noticed that people are posting "grenade launchers" that look eerily similar to crappy block trigger guns

The Jamalam (author)iKill2008-12-18

? sear triggers are still blocking the firing pin

iKill (author)The Jamalam2008-12-18

no they arent they hold it back thats not blocking, block would mean to get infront of it.

The Sensei (author)iKill2013-07-02

this is exactly true......kind of. all knex triggers are technically BOTH block and sear, being that an object "blocking" the pin at some point must move in a "searing" action to allow the gun to fire. but the main point is like you said, a "block trigger" here is one that has something in front of the pin to hold it back, whilst a "sear trigger" is one that holds on a small latch type mechanism on the rear of the pin. sear triggers are notably more difficult to design, however they do produce much better results in firing. (they also very rarely break firing pins!)

The Jamalam (author)iKill2008-12-19

its blocking its path by getting in front of at least some part of the pin

Mepain (author)The Jamalam2008-12-20

A trigger that is a block trigger blocks the pin from the front; this is the term that we have adopted. You're getting too literal with the term. Block- blocks from the front. Sear- holds from the rear.

The Jamalam (author)Mepain2008-12-20

the whole point of a term is that it is literal! I know wht they are

Mepain (author)The Jamalam2008-12-20

The whole point of the term is to identify a part of a gun. When playing tug of war, and you are holding the end of a rope with a knot in it (hand in front of the knot), you do not "block" it, you hold it. The same goes for a sear.

pls (author)maxxxem2008-12-16

Not all, but most.

maxxxem (author)pls2008-12-16


pls (author)maxxxem2008-12-17


DJ Radio (author)fobblewabble2008-12-20

err, not every gun is. My crossbow uses a ratchet slingshot system. RBGs are not blocks either.

bounty1012 (author)DJ Radio2009-08-13

yes rbgs are technically, they got some sort of mechanism that blocks the cog from turning.

nerfdude (author)bounty10122009-08-30

Some RBGs don't even have cogs or gears, but instead are more like a sling shot.

fobblewabble (author)DJ Radio2008-12-21

someone already said that. I meant guns like this!!

An Villain (author)fobblewabble2009-07-05

sear system guns are like this but they lock the firing pin in place, look up knex p90 desechos by M16.

The Jamalam (author)fobblewabble2008-12-18

nope. what about guns that don't have firing pins? or true semi autos?

fobblewabble (author)The Jamalam2008-12-18

this gun is a block trigger, not a push trigger where the heck did he get that from?

psharpep (author)fobblewabble2009-07-04

Well for me it's easier just to tap the barrel of my gun than find a trigger and pull.

DJ Radio (author)fobblewabble2008-12-20

you have to push the trigger to fire it.

fobblewabble (author)DJ Radio2008-12-21

On every other normal gun you have to pull the trigger. Why isnt it called a pull trigger instead of a true trigger.

DJ Radio (author)fobblewabble2008-12-21

pull triggers do not use hinges, you just pull it back, and you let it go to shoot. True triggers use hinges.

ILIKEPIE333 (author)DJ Radio2009-03-01

what? how does that make sense? As you explained it, pull triggers are not triggers at all then

DJ Radio (author)ILIKEPIE3332009-03-01

yes, i did mean it like that.

ILIKEPIE333 (author)DJ Radio2009-03-01


fobblewabble (author)DJ Radio2008-12-21

My next queshtion is... How is this a grenade launcher?

ILIKEPIE333 (author)fobblewabble2009-03-01

no clue see my top comment

fobblewabble (author)DJ Radio2008-12-21


ILIKEPIE333 (author)fobblewabble2009-03-01

I know!

psharpep (author)The Jamalam2009-07-03

Well that would be amazing, but you would need some sort of energy supply to pull back the firing pin. A motor maybe? Hmmm...

The Jamalam (author)psharpep2009-07-04

Or the rotary motion of a trigger!

psharpep (author)The Jamalam2009-07-04

Yes that's what my second comment is about. But it'd need to be a large trigger or you wouldn't get much power.

psharpep (author)The Jamalam2009-07-03

Or, we could make a gun where pulling the trigger back pulled back the pin and released the shot at the end.

dsman195276 (author)fobblewabble2008-12-17

but the name block trigger was given to the ones you turn.

maxxxem (author)dsman1952762008-12-21

yes and the one i made does NOT turn

DJ Radio (author)maxxxem2008-12-21

you can mod it to turn though.

Bartboy (author)fobblewabble2008-12-16

All of them but slingshot guns.

The Jamalam (author)Bartboy2008-12-18

and rbgs, and true semi autos?

Bartboy (author)The Jamalam2008-12-18

Semi autos are different, and rbgs work the same way as slingshot guns.

The Jamalam (author)Bartboy2008-12-19

not the same. semi auto rbgs are different

Bartboy (author)The Jamalam2008-12-19

Rbgs work the same as slingshot guns!

The Jamalam (author)Bartboy2008-12-19

NO THEY DON'T! Slingshots use rubberband energy to propel the ammo forward. RBGs Fire rubberbands with a different mechanisms. semi auto rbgs have a pinwheel

DJ Radio (author)The Jamalam2008-12-20

My crossbow uses the same mech as my SPEC-9 pistol.

Bartboy (author)The Jamalam2008-12-19

They both have the same type of trigger with a cog, if it has a real trigger.

pie25x (author)2010-06-17

I made this and when I fired it without ammo, the pin shot out farther that my gun

Dashadower (author)pie25x2012-06-23

LULZ! That would mean your gun would need some touching up!

knexlegowizard101 (author)2010-08-06

theres one extra pice what do with black y thing

right were it says "push to fire". =D