The At44 is one of the well known products of Hatsan company around the world. many airgunners buy At44 due to its low price. almost all of the owners complain about low shots and the tolerance in chronography.
To solve this problems and enjoy more of your At44, we provide this regulator to you. Its very easy to install it in your cylinder. there is no need to drill the cylinder. just remove the sealing Oring in the brass valve and install the regulator. You would definitely be impressed by the result.