So back on this SBR issues I'm having. If I have a 8.5" ar15 and lathe a 7.5" tube ( like a mag light solvent trap ) have it welded/pinned on the barrel for the 16" length requirement, is that legal ? Is a welded flash hider now considered the barrel and what defines this, can anyone lathe their own legally? Are solvent traps legal and did that bill get passed on the suppressor in Washington. Lots of a questions, thanks guys..