S.B.A.R (Straigh-pull Bolt Action Rifle)
by Ben_the_Builder in Living > LEGO & K'NEX
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S.B.A.R (Straigh-pull Bolt Action Rifle)
![20190818_102141.jpg](/proxy/?url=https://content.instructables.com/FP2/DM1I/JZD6UW59/FP2DM1IJZD6UW59.jpg&filename=20190818_102141.jpg)
![20190818_102154.jpg](/proxy/?url=https://content.instructables.com/F9G/5SGC/JZD6UW5S/F9G5SGCJZD6UW5S.jpg&filename=20190818_102154.jpg)
So I have succumb to my brain boggling idea thay I needed to make another semi realistic action in a new gun.. so I went to a straight pull bolt action rifle and came.up with this monstrosity (don't mind the looks, I don't have much K'nex left).
- Straight-pull bolt
- Internal 6 round mag
- Block trigger
- Top loading
- Occasionally the bolt will seize, but the firing pin can move freely so fixing a jam is easy.
- Straight-pull bolt
- Internal 6 round mag
- Block trigger
- Top loading
- Occasionally the bolt will seize, but the firing pin can move freely so fixing a jam is easy.
Bolt Closed
![20190818_102202.jpg](/proxy/?url=https://content.instructables.com/F02/Z4MK/JZD6UW9W/F02Z4MKJZD6UW9W.jpg&filename=20190818_102202.jpg)
![20190818_102234.jpg](/proxy/?url=https://content.instructables.com/F9W/N8AQ/JZD6UW54/F9WN8AQJZD6UW54.jpg&filename=20190818_102234.jpg)
![20190818_102231.jpg](/proxy/?url=https://content.instructables.com/FPM/8NFS/JZD6UW5R/FPM8NFSJZD6UW5R.jpg&filename=20190818_102231.jpg)
![20190818_102309.jpg](/proxy/?url=https://content.instructables.com/F87/VJ4Z/JZD6UW69/F87VJ4ZJZD6UW69.jpg&filename=20190818_102309.jpg)
This is not a complete 'ible, I literally finished building this thing at 3am and wanted to see what people thought.
The Gun uses an open/closed bolt mechanism, where in this particular gun there is a sleeve that moves part of the barrel back and forth.
Pictures in the step are the bolt in the closed position, ready for prime.
The Gun uses an open/closed bolt mechanism, where in this particular gun there is a sleeve that moves part of the barrel back and forth.
Pictures in the step are the bolt in the closed position, ready for prime.
Bolt Open
![20190818_102211.jpg](/proxy/?url=https://content.instructables.com/FIT/CNE8/JZD6UW8C/FITCNE8JZD6UW8C.jpg&filename=20190818_102211.jpg)
![20190818_102213.jpg](/proxy/?url=https://content.instructables.com/FPL/AV4T/JZD6UW4U/FPLAV4TJZD6UW4U.jpg&filename=20190818_102213.jpg)
![20190818_102225.jpg](/proxy/?url=https://content.instructables.com/FMK/3V7W/JZD6UW35/FMK3V7WJZD6UW35.jpg&filename=20190818_102225.jpg)
Looking at the photos in the previous step you can note the different positions the bolt/sleeve has when the action is primed. It does make loading a bit tricky, but you can either load from the top, or pull the mag pusher out and load from the bottom.
Primed and Ready to Fire.
![20190818_102238.jpg](/proxy/?url=https://content.instructables.com/FYL/9L6H/JZD6UW5K/FYL9L6HJZD6UW5K.jpg&filename=20190818_102238.jpg)
![20190818_102309.jpg](/proxy/?url=https://content.instructables.com/FUG/XEV0/JZD6UW4Y/FUGXEV0JZD6UW4Y.jpg&filename=20190818_102309.jpg)
![20190818_102402.jpg](/proxy/?url=https://content.instructables.com/FGQ/E93C/JZD6UWDS/FGQE93CJZD6UWDS.jpg&filename=20190818_102402.jpg)
That's pretty much it, mechanism has done it's job and it's good to go. You can't pull the bolt out of the gun as I haven't got enough pieces to makw that a part of the mech. But it does habe enough travel to load and fire the gun uaing the bolt sled.