Last year the BLM issued a draft revised management plan for the SDNM that proposed closing 99% of the monument to shooting. That was a draft proposal.
They just issued the "real" proposal which is not significantly different from last year's draft proposal. Of the 4 listed alternatives they will implement alternative C which closes 99% of the monument to shooting.
In 2023 they proposed closing all of the monument to shooting except 4802 acres.
In 2024 the plan they will implement closes all but 5295 acres to shooting.
There is a 30 day period (expiring on 2/22/2024) for filing a "protest." Not sure what good that will do but it's there.
Here's a map from the current proposal showing shooting allowed areas (tiny blue circles outlined in red.)
Note the green shaded areas. These are areas where shooting will be prohibited, not because there are any significant cultural or natural resources, but because they claim the areas lack suitable backstops for safe shooting.
I think there are plenty of washes and low hills in these areas for them to be safe for recreational shooting.
Here's a link to the Federal Register announcement.
https://www.federalregister.gov/documents/2024/01/22/2024-01063/notice-of-public-comment-period-on-proposed-recreational-shooting-closure-in-the-sonoran-desert#addresses Here's a link to the BLM page with the current 2024 documents (and the 2023 documents) and links to enter a protest.
https://eplanning.blm.gov/eplanning-ui/project/2019811/510