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You can fit a paintball bottle on the charger with an appropriate adapter; therefore, you can certainly fit a propane tank instead (or even just fill the CO2 tank with propane instead).

 

That gun looks like it needs an MED, if it doesn't have one already. That last photo looks like absolutely no fun at all; imagine that on your face...

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With a few exceptions, this is the business plan of almost all the entire airsoft industry.

Awww yeah.  Super Shorty version incoming  

FPR steel bolt, looks much more realistic than the original, cycles the same as before.   

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Todays CAM870 pro tips are;

 

  • When removing and installing the trigger group, keep the hammer cocked. Makes it a lot easier.
  • When working with trigger group out and stock off, to reinstall the trigger group and keep shell latches in place, put in the buttstock backing plate. It keeps the shell latches in the correct position!

Also the APS rail/scope mount is off-spec. The side bends of the metal bottoms out agains the top of the reciever before the front hole aligns. Will dremel dat *suitcase* tomorrow and make it fit.

 

Oh and another thing. The plastic on the Hogue TAMER grip is one of those that isn't very easy to work with. The Dremel sanding tool barely makes a scratch and a hand file even less so. Since you need to remove almost half it the material interfacing with the reciever, my tip would be to saw it off or use a Dremel cutting disc. Leave it a bit too high and then finish it off with a hand file for a perfect fit.

 

For the shell latch cut-outs I used a heavy duty Xacto knife and just used it as a chisel pretty much. Cut a little at a time and you'll get a nice clean cut in there.

 

I can put up pics of the mods required later. But basically you just match how the OEM stock looks and it's fine.

Edited by NonEx
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I was thinking of how to simulate blued steel instead of the flat matt black, any pointers?

Hey buddy. An application of Cerakote "Midnight Blue" (H-238Q) with double hardener (12:1) is the closest "paint" finish to resembling a glossy blue finish. 18:1 is close to satin and 24:1 would be matte :)

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Also the APS rail/scope mount is off-spec. The side bends of the metal bottoms out agains the top of the reciever before the front hole aligns. Will dremel dat *suitcase* tomorrow and make it fit.

 

With this on the gun, will the shell catcher still fit without problems?

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OK so shell catcher is a no go with the rail in place.

 

Here are some pics of the buttstock plate;

 

latches1_ed.jpg

 

latches2_ed.jpg

 

The gray area is the plate that can be removed.

If you have the trigger group out, and remove that plate, the shell latches will pop lose from the internal cutouts in the reciever and bend inwards towards the center of the reciever.

 

Here are some pics of my modded TAMER pistol grip;

 

stock1_ed.JPG

 

stock2_ed.JPG

 

The cutours on either side at the bottom there are to accomodate the shell latches that are kind of sticking out into the grip/stock interfacing area of the reciever.

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If your planning on using the 870 at close range, just use some damp paper towel instead of a plastic Wad. The spread will be wider and you won't have the heavy Wad hitting anyone. And you don't need to buy wads.

 

The spread using a small wadded up paper towel is more then suitable for close range.

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HPA tanks work nicely:

 

Is that tank actually full of HPA? It seems like a very, very bad idea to put 3,000psi HPA into a shell designed for 800psi CO2. Potential maiming bad. And, like blobface says...

 

Would have thought it needs the liquid co2, guess not!

 

... Surely the system needs the liquid-to-gas expansion to function effectively?

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Somebody tried that already in Hongkong and said it wont charge the shells.

It's what I have at home...and it's working. Might not be the best for range. But it's doing a number on my workshop door at 50'.

 

Also unless people put the CO2 canister above the shell when filling, they are not getting any liquid CO2, they are just getting the expanded 800psi air.

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Well, it might be enough to push the BBs out of the barrel, but it's not going to be anything like as powerful as the CO2 should be. HPA at 800psi is approximately 50:1 volume-for-volume for normal atmospheric pressure; that is, you can store 50x the volume of air at 800psi as you can at STP (14.696psi). Liquid CO2 at 800psi is approximately 450:1 volume-for-volume for normal atmospheric pressure; that is, you can store 450x the volume of CO2 at 800psi as you can at STP.

 

So, provided you fill the shell with liquid CO2, you can store 9 times the volume of gas in each one compared with filling it with HPA at the same pressure. That might make it safer to skirmish - it's not necessarily a bad thing.

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