Two rotary mechanism parts are provided in a rotary expander. In one aspect of the invention, a computer implemented method comprises receiving, on one or more computers, a record having one or more attributes from a source system. The bearing assembly comprises a compliance ring including a plurality of beams. The method further includes allowing P2P mobile entities to use WAN physical layer channels in the second group of subframes to communicate P2P control information and P2P data. The handgun attachment further comprises a forward member adapted to have load exerted thereon and transferring the load to the subframe and not to the slide, thereby maintaining the handgun in battery and allowing the handgun to be fired in a close quarter situation.