help with gun mechanism

[SNIPE]

Hi, i need some way of building the trigger and locking mechanism so that when you pull the slider back on the side of the gun it keeps the bullet in place ready to be fired, and when you press the trigger it unlocks that and pushes the springs out therefore firing out the bullet.

I have the muzzle barrel done and the sliding mechanism on the side which has the firing springs built

in.

The bullets simply fall out of the mag into the gun by gravity as the mag is on the side but tilted a little so each bullet will roll out, this means that since the loading gap is the right size, only one bullet will go in at a time, the rest will be queued in the magazine.

This does not effect the aiming much also because it does not get in the way of the sight.

The slider on the side has a grip which you slide back, this loads the bullet into the channel where it is then ready to be loaded by sliding the side grip back and then letting go of it.

Here is the model itself so far:

http://www.brickshelf.com/gallery/finneykris/mfr/gun.lxf

The orange bit is just the slider mechanism itself.

In short the thing i need needs to keep the slider back when put there, and release it when the trigger is pressed, it also has to compress the springs you see which fire the bullet out.

elastic bands usually snap or get weakened so i was thinking of somehow using springs or parts of the LEGO spring assembly's but if that cant be done then i will probably have to use them.

Edited June 23, 2011 by SNIPE

[Alasdair Ryan]

What about a shock absorber and/or a small pneumatic ram

or what about one of these

[SNIPE]

Hi, I've just came up with a good model, pneumatic springs are kind of slow and take up too much space.

The black pin would not fit but it attaches through the two half mounts and the shock mount. the two pointed forks on one side is the catches, the two fork mounts on the opposite side is for the trigger mechanism.

Here is the current model of the mechanism:

Edited June 23, 2011 by SNIPE