Kinda rough looking stock. It is marked with Korean characters and probably is from a 90's Blue Sky imported carbine from Korea. If it is a US made stock, there should be a letter code inside the sling cut on the left side. Korea also made replacement stocks, but I think they were mostly the potbelly M2 style of stocks from what I have seen. They used teak or some other wood native to their region. The Korean paint markings have no meaning to us and are most likely detract from any collectability of the gun.
Your gun is like your nose, it is just wrong for someone else to pick it for you!