Been using one of these for years. Less than $30 and I've been very happy with it.
https://www.amazon.com/Savior-Equipment-Patriot-Single-Tactical/dp/B07FY3C45S/ref=sr_1_13?crid=26G27HM759Z0U&keywords=rifle%2Bcase&qid=1674498545&sprefix=rifle%2Bcas%2Caps%2C114&sr=8-13&th=1&psc=1