In this photo are all three of the rifles that are in Colt's "AR-15 Military Classics" series. From back to front are CRM16A1 (Ltd. Ed. 2500), CRXM177E2 (Ltd Ed. 2500) and the 2018 SOCOM Carbine (open production, no limit)
All three rifles have U.S. Property roll-marks.
The future models in the series are:
Model 02 (Ltd Ed. 1000)
M-16 (Ltd Ed. 1000)
XM 16 E1 (Ltd Ed. 2500)