Abstract: The application discloses an accessory rail for coupling an accessory to a fixture. The accessory rail includes a body including a front side and a rear side, and an accessory mounting structure at the front side of the body. The accessory mounting structure is capable of detachably engaging an accessory for the fixture. The accessory rail includes two protrusions extending from the rear side of the body. The two protrusions are configured to at least partially engage with the fixture during mounting of the accessory rail to the fixture.

Abstract: The application discloses an optic mount assembly for coupling an optic mount to a side rail of a firearm. The optic mount assembly includes a clamping bar including a body and protrusions extending from opposing side surfaces of the body. The optic mount assembly includes a lever pivotally coupled to the clamping bar. The optic mount assembly includes a fastener coupling the lever to the clamping bar. The clamping bar is configured to be at least partially inserted into and engaged with a cutout of the side rail, and configured to be inserted into a cutout in an optic mount.