Skip with the SIG and go with the FAL. While I love Sig pistols, I’m not as enamored with the 556, seems a bit off balance and a little too proprietary for my tastes. However, if you can find one for $1300.00 that’s a good deal.
Those I’ve seen usually start at $1500. Have you considered a AR-10 (.308) build?
AR-10 from which company? Bushmaster? I forget the company that sold them - they were in IL.
The DSA stuff is supposedly very good.
The SA 58 FALs are a bit more expensive while the STG 58 Austrian FAL’s are a bit less. They have gone up. Just preparing in case TSHTF or TEOTWAWKI. A bit more kick than .223 in the FALS.
The hard core guys said if UN types take over then a quiet .22 pistols will be good to have as part of the kit.