A locking mechanism for a medical implant may comprise a buckle member fixedly attached to a tubular anchor member, a post member axially translatable relative to the buckle member, wherein the post member includes a first proximal portion and a second proximal portion, the first proximal portion being disposed adjacent to the tubular anchor member and the second proximal portion being disposed radially inward of the first proximal portion, and an actuator element including a lateral protrusion proximate a distal end thereof, the actuator element being releasably coupled to the post member. The post member may include an engagement portion configured to engage the buckle member such that movement of the post member distally relative to the buckle member is prevented. The second proximal portion may be configured to deflect away from the first proximal portion to release the actuator element.
