This generation 2 bottle filler  beer gun is a great way to fill bottles from a keg.

The kit includes the following  

1 x Bottle Filler Beer Gun Unit with gas and liquid trigger with silicone tip. 
1 x 1/4" x 6.35mm duotight fitting
1 x Red Gas Carbonation Cap x 6.35mm Male duotight fitting (Connect your gas ball lock line directly to the unit, no longer a permanent fitting!)
1 x 1.5-2m Length of 4mm x 8mm EVABarrier Hosing
1 x 8mm Compression x 8mm female duotight fitting Elbow
1 x 8mm duotight x Yellow/Black liquid ball lock disconnect

Please use the images as your connection guide.

 Every part that comes into contact with your beer is stainless steel. This unit features a CO2 purge, which helps to prevent oxidation during filling. 

These features, coupled with a CO2 jacketing tube for bottle purging and ergonomic valve actuators, makes filling bottles faster, intuitive, more accurate, and easier than ever! Because the Bottle Filler Beer Gun doesn't require a pressurizing stopper, you can fill a bottle of any depth without buying different stem lengths or adding plastic hose extensions.