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Knex UMP-45

Step 5Firing

Firing
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Alright we're almost finished! The gun fires pretty decently. Even with the slanted mag it's 99.9% reliable and I have never had a jam of any sort. If you find that the muzzle gets in the way (which it shouldn't if you're using enough power) then just take of the extra part that makes it look rounded.

1-2. Here's the firing pin. You probably won't need the taped part which is basically a tan and I think a blue ring? Anyways I like the rubber band better. If you wrap it around the orange I think it'll hold it together. The rubber band makes the gun a little less loud when firing. The red connector is just to grab onto when you cock it as the orange will be in the back of the gun and hard to reach. Attach them about here. Move them further up for a little more power.
3-5. Here's the magazine. You can make it as big as you like but this is the most realistically sized one. It holds about 14 dark greys comfortably although you could get 15-16 if you're careful. Put the green rod in where you see it to hold block the ammo.
7-9. You then insert the magazine AK style as in you insert it at a steep slant and bring the white rod into the slots of the blue connector and then swing the magazine up so that the other side locks into position. This should be a sturdy enough connection so that it isn't pushed out by the mag pusher depending on how many pieces of ammo you load. Then when inserted press carefully (you may need to push up on the white rod to make it line up correctly or it'll wreck the magazine) on the white rod to push out the green rod then pull it back out.

Proceed to cock the weapon and then fire. The fun part is that you can make several preloaded magazines and swap them out fairly quickly. Enjoy.
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14 comments
Jan 31, 2012. 11:33 AMjedijaxson says:
I just built it, but it has TERRIBLE range. Any solutions?
Jan 31, 2012. 5:15 PMjedijaxson says:
I moved the rubber band I was using to a different position. It now shoots farther, but not far enough. Oh and BTW, I faved it :P
Feb 5, 2011. 9:58 AMbattle-rifle says:
i dont use the broken orange xD

my gun works perfect!:D

thnx ( i have upgraded the out way for the ammo if it shoots out
its shoots up xD

now i have the oranjes brided out with 3 orananges!

now its shoots better :D
and i have made it a scope :)
Oct 25, 2010. 8:50 AMTheKnexNoob says:
Can anyone help? The firing pin just goes straight past my trigger, whenever I try to cock it. The trigger just catches it. I don't know what to do?
Nov 21, 2010. 12:02 PMmahmel says:
Do you use a rubber band for the trigger getting up?
Nov 28, 2010. 9:07 AMTheKnexNoob says:
yes, but the trigger just gets moved by the firing pin whenever i cock it.
Jul 30, 2010. 9:13 PMbillab0ng says:
I have made this gun but cant work out how to fire it??? HELP PLEASE????
Dec 21, 2009. 7:02 AMsdds says:
do you have to have the broken orange connector?
 Is it important ?
Jul 15, 2010. 2:02 PMNYPA says:
Yeah. If you don't break it, the gun will, because the pin will hit it.
Mar 10, 2010. 10:23 PMKrazyKitsune says:
i've just built 2 mags for mine, and the connector has to be broken or it will block the firing pin, just so everybody knows...
Apr 20, 2010. 11:13 AMross007 says:
please make instructions clearer
Apr 4, 2009. 9:03 AMThe Jamalam says:
whenever i put the white rod in to push the green out, the mag breaks. help?
Nov 8, 2009. 1:42 PMu stlole my pie908 says:
really u dont have to push the green rod out. and it works kinda better in my standerds

Apr 4, 2009. 9:10 AMThe Jamalam says:
nvm...
Mar 19, 2009. 11:10 PMgrevious says:
step 5, picture 5, you forgot to mention the broken orange at the top of the clip.

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Meh, you'll learn more about me talking to me than trying to read a sum up paragraph here...