Hey guys, recently found this forum - pretty awesome, just wanted to say thanks for being here to help people like me! To start: I know there's new law's in WA as of Dec 2014 I think, that now require you to transfer guns on paper to other owners. However, I went into a gun shop in Bellevue, to sell my girlfriend my pistol - and they told us they don't know how to do the transfer or that they aren't allowed. So...were they BS'ing me, or would you guys know where I could do this at ? Next: I want to sell my Sig Sauer M400 5.56 and build a 300 blackout AR pistol. I have a 300 blackout bolt action rifle, that I absolutely love shooting. I've never built a gun before - however, in the gun shop here in Bellevue, everything seems insanely overpriced. They have a 300 blackout pistol upper for like $650. However, I noticed on Bud's gunshop online, I can get a CMMG MK4 in 300 black for like $850! Is it just because everything is generally cheaper online, or should I go into the store and ask them the reason behind the price? (maybe it has a super nice barrel on it or something?) On top of that, I had two other question for those with AR pistols. What barrel size would work best for the 300 blackout? I was thinking 8" like the CMMG has, but I've read a few sites that suggest 9" is the sweet spot for the 300 black. Just wanted some opinions on here. Other question - the buffer tube. (I initially asked a question about shouldering the buffer tube, but I understand this is a very controversial issue, and I will not go into buying this weapon with the intention to shoulder it. I will however be interested in resting my cheek on the buffer tube - so I'm assuming I'll want some kind of padding there) Thank you to anyone who can give me some insight on the above items. I shoot every now and again, but it's something I'm interested in getting into more.