AAA SAP Prototype SN.100000
This prototype is believed to be the only SAP manufactured with a multi-lug AR15 type bolt.© RARCO Engineering

AAA SAP Prototype SN.100000 (with stock)
SAP with AR15 bolt and folding stock.© RARCO Engineering

AAA SAR & Leader T2 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.