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807 Posts
I'll start with this. Before people start bombing this thread with questions that have been answered elsewhere (and so I don't have to link a whole bunch of pictures), here are two links you should read:
1. Read at least the OP in this thread:
http://www.airsoftsniperforum.com/phpBB/phpBB3/viewtopic.php?t=2851
2. Read at least the first few pages of this thread:
http://www.airsoftsniperforum.com/phpBB/phpBB3/viewtopic.php?t=2920
There, now with that out of the way, here is the plan: To build a system that will give straight consistent flight to the BB (accuracy) that will maintain shot groupings out to a minimum of 150' (46m for you guys across the pond).
Disclaimer: There will be some concepts in here that even after the build is complete I will not share, mainly the exact way that the hop up works. This may change down the road, but for the time being...
The project gun is a CA SL9, however, this should be able to be done with any G36 series AEG, since all that I am doing is replacing the outer barrel assembly.
Here is your typical G36 style upper. Under it is a piece of 6061 aluminum bar: 1"x1.5"x2' eventually this will be cut down in length (to about 14") to fit the hand guard, but I want to give myself room to mess up. Under that you have the standard assembly of comparison.
Unfortunately this is about as far as I got today due to weather and some tooling issues at the moment, hopefully there will be more headway tomorrow.
You can see on the side of the receiver that there area black marks, this is how far back the block will go once I can start cutting to fit it down there, and yes, it will fit against the mechbox.
The first step will be to mount it with the two mounting screws, and then I will start cutting to fit the mag well, Mechbox and nozzle before I drill for the barrel. Like the title says, this will use the twin hop that I have been playing with, however I need to get this made and source a barrel, in that order.
The reason for the length of the bar, being 14" by the time I am done with it, is for the LRB part of the build. The back 6-8" will be mounted in the block with a long arm extending under the barrel, as far forward as the foregrip will allow me to conceal. Some of the extra material will be used to fabricate a very short outer barrel that will be threaded for a suppressor, and an adjustment screw will be mounted at the end of the arm to pull the barrel down. The actual "outer barrel" block will be fabricated with an oval to it for the barrel to lie in, this way when the screw is adjusted down, it will pull evenly and straight down, minimizing lateral movement.
Also, I will be adding to the OP with updates to avoid spreading information across the entire thread.
1. Read at least the OP in this thread:
http://www.airsoftsniperforum.com/phpBB/phpBB3/viewtopic.php?t=2851
2. Read at least the first few pages of this thread:
http://www.airsoftsniperforum.com/phpBB/phpBB3/viewtopic.php?t=2920
There, now with that out of the way, here is the plan: To build a system that will give straight consistent flight to the BB (accuracy) that will maintain shot groupings out to a minimum of 150' (46m for you guys across the pond).
Disclaimer: There will be some concepts in here that even after the build is complete I will not share, mainly the exact way that the hop up works. This may change down the road, but for the time being...
The project gun is a CA SL9, however, this should be able to be done with any G36 series AEG, since all that I am doing is replacing the outer barrel assembly.

Here is your typical G36 style upper. Under it is a piece of 6061 aluminum bar: 1"x1.5"x2' eventually this will be cut down in length (to about 14") to fit the hand guard, but I want to give myself room to mess up. Under that you have the standard assembly of comparison.
Unfortunately this is about as far as I got today due to weather and some tooling issues at the moment, hopefully there will be more headway tomorrow.

You can see on the side of the receiver that there area black marks, this is how far back the block will go once I can start cutting to fit it down there, and yes, it will fit against the mechbox.
The first step will be to mount it with the two mounting screws, and then I will start cutting to fit the mag well, Mechbox and nozzle before I drill for the barrel. Like the title says, this will use the twin hop that I have been playing with, however I need to get this made and source a barrel, in that order.
The reason for the length of the bar, being 14" by the time I am done with it, is for the LRB part of the build. The back 6-8" will be mounted in the block with a long arm extending under the barrel, as far forward as the foregrip will allow me to conceal. Some of the extra material will be used to fabricate a very short outer barrel that will be threaded for a suppressor, and an adjustment screw will be mounted at the end of the arm to pull the barrel down. The actual "outer barrel" block will be fabricated with an oval to it for the barrel to lie in, this way when the screw is adjusted down, it will pull evenly and straight down, minimizing lateral movement.
Also, I will be adding to the OP with updates to avoid spreading information across the entire thread.