Power actuated tool and shroud for use with the tool

This invention relates to power actuated tools and more particularly to explosively actuated tools for driving a fastener such as a pin into a substrate such as concrete or steel. A power actuated tool () for driving a fastener into a substrate such as steel or concrete, comprises a housing (), a barrel assembly () mounted to the housing, and a piston displaceable within the barrel assembly upon firing of the tool to drive a fastener from the forward end () of the barrel into the substrate, at least a forward end of the barrel assembly being mounted for axial movement relative to the housing whereby firing of the tool requires the forward end () of the barrel assembly to be pressed against the substrate to cause retraction of the forward end relative to the tool housing. A telescope shroud () surrounds the forward end of the barrel assembly to at least partially suppress noise emission resulting from firing of the tool.