Unless you have something special in mind, we recommend the ATAS1/2X28 as the included insert. Inserts are also available for most of the popular import .22s such as the Walther P22, G22, M&P22, PPK/S .22, Colt/Umarex 1911/22s, GSG and Sig 1911/22s, factory threaded Sig Mosquitos and Sig P226/22 (The Universal Wrench will work on all those pistols at the time of this writing.)
This silencer weighs in at just over 2 ounces with a 1/2X28 insert. It is nominally 1” in diameter and 5” long. The standard tube color is matte black, but you may order these with a matte Man-Genta Royal Purple, matte Snappy Bubble Gum Pink or a matte Party Blue tube at the same price if you desire.
The Bowers Group Paradigm silencer is not intended for fully-automatic fire; it is intended to be as small and light as we can make it and still achieve world-class performance. The alloy steel Bowers Group USS silencer is significantly heavier and longer, can be readily disassembled and is suitable for heavy full automatic .22LR fire.