Prosthetic attachment lock

An attachment lock for a prosthetic limb comprising:

• a housing attachable to an outer surface of a prosthetic socket, and defining a distal end having an adaptor for connecting the housing to the prosthetic limb;
• a locking member contained within the housing, the locking member carrying a pawl member and a rod connected to the pawl member;
• an opening extending through the housing and the locking member, the opening arranged to allow a locking pin of a liner to be inserted into the attachment lock and to engage with the pawl when the locking pin is inserted into the attachment lock;
• and
• at least one spacer selectively positionable in the housing in different arrangements below and above the locking member so as to reduce free play between the pawl member and two adjacent serrations on the locking pin by raising and lowering the locking member including the pawl member and the rod relative to the housing along a longitudinal axis of the locking pin, wherein the at least one spacer defines a central opening arranged to allow the locking pin to extend through the at least one spacer.