Abstract: A 3-in-1 mount adapter for a firearm having an engagement interface with a plurality of openings includes an attachment base having at least one mounting hole; a mounting plate including at least one ridge receiving through hole aligned with the mounting hole; and at least one fastener assembly including a nut having a ridge passed through the ridge receiving through hole and the openings of said firearm, and a bolt having a threaded portion engaged with the nut and screwed in the mounting hole for affixing the attachment base with the mounting plate; wherein the nut includes a nut head radially extended from the ridge and having an cross sectional area larger than an area of the mounting hole to block the nut head on the mounting plate.

Abstract: A firearm mount for a firearm includes a mounting body, a sight module, and a mounting interface. The mounting body has a first mounting face adapted for detachably coupling with the firearm and an opposed second mounting face. The sight module is supported by the mounting body between the first and second mounting faces thereof. The mounting interface is provided at the second mounting face of the mounting body to define a mounting direction aligning with a barrel axis of the firearm.

Abstract: A lens cover for a lens equipment includes a tubular cover body for detachably coupling at a lens housing of the lens equipment in front of a lens thereof, a cover module, and a locking mechanism. The cover module includes a cover panel and a joint unit coupled between a sidewall of the cover body and a peripheral edge of the cover panel to enable the cover panel to be moved between a covered position and an uncovered position, wherein in the covered position, the cover panel is supported at a front portion of the cover body for covering the lens, and in the uncovered position, the cover panel is rotated sidewardly about the joint unit for uncovering the lens. The locking mechanism is provided at the sidewall of the cover body for releasably locking the cover panel in the covered position.