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 Group moderator 
Quoting izak silverstone break action shotgun
I tried one years ago, maybe I'll build one soon, which can be anytime from me tearing apart my Barrett and years from now due to college.

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| October 26, 2010, 8:31 pm
I am working on an AK-47 Lego gun. Im trying to figure out if I can make it eject shells by pulling the trigger using rubber bands or something similar. I would like to make it fully functional. If anyone could tell me what I could do that would be great.
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| November 2, 2010, 9:54 pm
Quoting nikolas cote
i need help finding a new gun to build. any suggestions?

M4A1,M1A1,M2 Flamethrower(joke), magnum, M9, Colt .45, Etc.
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| November 2, 2010, 9:55 pm
 Group moderator 
Quoting beanbag 97 [MOC] Im trying to figure out if I can make it eject shells by pulling the trigger using rubber bands or something similar.
I was pondering of an idea like this. The problem is getting the bolt assembly to close after ejecting the casings.

A simple way to only eject on trigger pull, is to hook the rubber band on the back end of the bolt assembly and hook the other end of the rubber band to the inside back of the gun. Then you have the trigger be the only thing holding the bolt forward. Pull the trigger, then the bolt is released and goes backwards. However, there is no return mechanism to close the bolt; you'd have to do that manually. Now ejecting cartridges realistically is tricky and may require you to cut Lego pieces.

Special note for the return mechanism: I have an untested idea. In order for the bolt to open on trigger pull, the mech pulling (rubber band) or pushing (spring) the bolt backwards needs to be engaged and the mech that sends the bolt forward must be disengaged. When the casing is ejected, the former mech must disengage and the latter mech needs to engage...somehow. There are a lot of details that complicate this and I have no more time to think of it now.

Just putting that out there.
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| November 2, 2010, 10:49 pm
 Group moderator 
...and the whole thing has to reset back to original setup when the bolt closes. Ugh, it's harder than I first thought :P
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| November 2, 2010, 10:51 pm
Quoting PyBrick Replicas
Quoting beanbag 97 [MOC] Im trying to figure out if I can make it eject shells by pulling the trigger using rubber bands or something similar.
I was pondering of an idea like this. The problem is getting the bolt assembly to close after ejecting the casings.

A simple way to only eject on trigger pull, is to hook the rubber band on the back end of the bolt assembly and hook the other end of the rubber band to the inside back of the gun. Then you have the trigger be the only thing holding the bolt forward. Pull the trigger, then the bolt is released and goes backwards. However, there is no return mechanism to close the bolt; you'd have to do that manually. Now ejecting cartridges realistically is tricky and may require you to cut Lego pieces.

Special note for the return mechanism: I have an untested idea. In order for the bolt to open on trigger pull, the mech pulling (rubber band) or pushing (spring) the bolt backwards needs to be engaged and the mech that sends the bolt forward must be disengaged. When the casing is ejected, the former mech must disengage and the latter mech needs to engage...somehow. There are a lot of details that complicate this and I have no more time to think of it now.

Just putting that out there.

Thanks I will go by your advice
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| November 5, 2010, 7:14 pm
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