Possible Clues:

• BB shooter
• Pellet firer
• Pellet shooter
• Broadcast piece comes as a blow and is hard hitting
• It operates by compression
• Broadcast on the radio piece that if it's targeted at you it will come as a body blow
• Weapon firing pellets
• Wild grain around undulating summit is capable of blowing someone away
• Pellet projector
• Where a good blow is needed to get the fire going