Miller, S.J. Adolphsen, C. Al-Mahmoud, Y. Arnold, A. Chang, W. Choi, Y. Compton, C. Coy, R. Du, X.J. Elliott, K. Gatzmaga, S. Hartung, W. Hulbert, J.D. Ji, F. Kelly, M.P. Kim, S.H. Konomi, T. Lewellen, J.W. Morris, D.G. Murcek, P. Murphy, M.J. Patil, M.S. Petersen, T.B. Piot, P. Popielarski, L. Saito, K. Smedley, J. Taylor, A. Teichert, J. Tousignant, B.P. Wei, J. Wenstrom, J.D. Witgen, K. Xiang, R. Xiao, L. Xu, T. JACoW Publishing Geneva, Switzerland 2673-5504 978-3-95450-234-9 10.18429/JACoW-SRF2023-FRIBA07 English 1003-1010 cryomodule SRF cathode cavity alignment Contribution to a conference proceedings 2023 2023-09 https://doi.org/10.18429/JACoW-SRF2023-FRIBA07 https://jacow.org/srf2023/papers/friba07.pdf The Linac Coherent Light Source II High Energy (LCLS-II-HE) Project at SLAC includes the construction of a low-emittance injector (LEI) and a superconducting quarter-wave resonator (QWR) at 185.7 MHz. Several alternatives to a superconducting radio frequency (SRF) QWR gun were considered for the LEI, including nor-mal-conducting RF guns evolved from the LCLS-II gun design. Compared to normal-conducting designs, the combination of an intrinsically outstanding vacuum environment (for cathode lifetime), and the potential for a larger ultimate performance envelope, led to the deci-sion to pursue development of the QWR-SRF gun. A prototype gun is currently being designed and fabricated at the Facility for Rare Isotope Beams (FRIB) at Michi-gan State University (MSU). This paper presents perfor-mance goals for the new gun design, an overview of the prototype development effort, status, and future plans including fabrication.