A bottom loading coupler may include a coupler body and a plurality of interlocks. Each interlock may be positioned in a corresponding slot in the body sidewall and have an engaged position and a disengaged position with respect to the coupler body. A coupler sleeve formed from a first material may be slidably positioned around the body sidewall of the coupler body. A wear ring formed from a second material may be disposed on the inner circumference of the coupler sleeve. The wear ring and the coupler sleeve may form an interlock retaining seat. The coupler sleeve may have a first, retracted position relative to the coupler body, wherein the interlocks are biased to the disengaged position and retained in the interlock retaining seat. The coupler sleeve may also have a second, extended position relative to the coupler body, wherein the wear ring biases the interlocks to the engaged position.