What is "arshtins"

The Arshtins were a group of Vainakh living in between the Ingush and Chechens, along the Sunzha's middle reaches and their tributaries. They were mostly known as Karabulaks, which they are called in Russian, from their Kumyk name. They also called themselves "Baloi". They were variously called an independent people, a subgroup of Chechens, or a subgroup of Ingush (which was further complicated by the fact that many in the 19th century considered Ingush to be a subgroup of Chechens, including many Ingush themselves). Their language is thought to have been somewhere between Chechens and Ingush (not unlike today's Galanchozh dialect spoken by the Myalkhi tukhum).