14/10/2026
South Africa’s first 8.6 Blackout is built on the Musgrave M21x Beast.
The 8.6 Blackout uses a standard bolt head, so it shares the same group as a 6.5 Creedmoor and a .308 Wi******er. That means you can order the 8.6 Blackout today and add a 6.5 Creedmoor or .308 Win barrel later without changing the action or bolt. Both extra barrels are made to the same tolerances, so you simply re-zero and continue.
A short 12–14 inch 8.6 Blackout barrel with a silencer is highly effective. Heavy 285–300 grain subsonic loads run at roughly 1,050–1,150 fps, while lighter supersonic loads reach 1,800–2,200+ fps. Most of the powder burns early, so the short barrel loses very little velocity. The silencer reduces noise and blast while the heavy bullet still carries solid energy at typical hunting distances.
You can keep the 8.6 Blackout as your quiet bushveld setup and use the 6.5 Creedmoor or .308 Win barrel for longer shots or different conditions — all on the same M21x.