NOTES- To determine what you need to put a specific upper on your TRIAD lower, please read below:
BUFFER PLUGS: The buffer plus vary for each system, dictated by the bolt design of the upper. If you are changing uppers, make sure to swap your buffer plug to prevent damage too your bolt. The MAT-9, BRN-180, DISSENT, and ARAK all take the same plug. The Foxtrot Mike uppers require their own specific plug and buffer. The PSA JAKL also requires its own unique plug and buffer.
TAKEDOWN LUGS: The JAKL and MAT-9 do not require a separate takedown lug, on those applications the lug is built in to the handguard. The BRN-180, JAKL, Dissent, and ARAK all require a specific takedown lug.
TRIGGER HOUSING CAPS: The JAKL and Dissent do not require Trigger housing CAP. The BRN-180, Foxtrot Mike, and MAT-9 each require their own specific caps.
HANDGUARDS: This is fairly self-explanatory. Only the JAKL and MAT-9 require handguards. For the JAKL, just choose the appropriate handguard for your barrel length.
