Leader Dynamics Bolt Assembly Comparison
Comparison of the Leader Dynamics T2 MK5 with the Australia Automatic Arms bolt assembly, showing AAA buffer, and some similarities of the SCAR and AR-180 parent design. © Aftermath Gun Club

Leader T2 & AAA SAR Series Stock Bolt
The replacement stock bolt can be found at Fastenal as part #1123172, made by Holo-Krome. This uses a 5/32 hex driver like the OEM bolt. © Aftermath Gun Club

T2 Series US Patent 4,358,986
This patent shows the receiver and bolt drawings, as well as the trigger housing (lower receiver) and firing control group.