Apparatuses, systems, and methods are disclosed for use in or with firearms. A firearm barrel trunnion includes a rear portion shaped to couple to a receiver for a firearm. The trunnion includes a front portion shaped to couple to a handguard for the firearm and to support the handguard without the handguard contacting other components of the firearm. A bore is formed within the trunnion, and is shaped to receive a barrel for the firearm.