The B&T SPR300 is a "super silent" bolt-action sniper rifle chambered in .300 Blackout, featuring an integral suppressor. It utilizes SIG SG 540/550 magazines and boasts a folding stock and a specialized bipod. The rifle includes a unique 3-position safety mechanism offering distinct levels of bolt and trigger control.
The FAMAE SG 543 is a Chilean-made, licensed variant of the Swiss SIG SG 540 series, chambered in 5.56x45mm NATO. It features an AK-style operating mechanism, a tubular buttstock, and offers safe, semi, burst, and full-auto fire modes with a rate of fire between 650-800 RPM. This review highlights its historical significance as one of the few remaining manufacturers of the SG 540 series.
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