Primos Hunting Calls. Primos Blue "Snap-On" Bugle Reed 2 pack. There is no adjustment needed--these reeds are Pre-tuned! The Blue "Snap-On" Silicone Reeds are for perfect tension and tone every time and silicone won't rot like latex. These reeds fit the Terminator, the Pack Bugle, and the Bull Horn and unlike latex reeds, they can last all season long. Comes 2 per pack. Primos Model No. 906. Primos Game Calls Blue "Snap-On" Bugle Reed 2 pack. Primos Hunting Calls.