Length, weight, overall height, overall width, and inside diameter. I have made attempts to account for various stock parts that remain (like barrel nuts or handguard caps) as well as extra features offered (like integral sling swivels) in order to provide an apples-to-apples comparison of weights.
Many potential purchasers find the internal diameter information available when trying to figure out if a given sound suppressor will fit inside a specific rail system.
