Hiw do I get this wood finish

[StarnesRowan]

I am starting a new build I have been looking at some contemary builders coming up with a really dark finish I would love to emulate. Like this rifle by the house brothers

 

[Sean E Bug]

aqua fortis

 

[TDM]

Depending on the wood, maple for example, multiple coats and heat cures of iron nitrate or the stronger aqua fortis will certainly darken the wood. Dixie Gun Works sell a dark antique stain that if used undiluted will give a very dark finish. The Laurel Mountain stains are concentrated so if used undiluted they too will be very dark in whatever shade you choose.

 

[64Springer]

Trans-Tint Mission Brown will get you there if you don't want to go the Aqua Fortis route.

This is what is T-T does to wood grain.

 

[wiscoaster]

I am starting a new build I have been looking at some contemary builders coming up with a really dark finish I would love to emulate. Like this rifle by the house brothers

You didn't mention what wood species you're using. Seems to me that's the crucial deciding factor.

 

[CuNosecap]

Yes, presuming you are starting with curly maple, that picture reminds me of the Laurel Mountain nut brown stain over nitric acid.