Cool, I missed that on your website.
Anyone wanting Upper release info, instead of bothering SBI via email, go to their website, https://spectreballistics.com/ , scroll to the bottom of the page, enter your email address under the heading "GET OUR LATEST NEWS AND SPECIAL SALES" and hit the Subscribe button.
Our upper is gonna be lightweight. Without the side plate, the dry weight is currently 170g for the left hand charge model.
Begging for a pencil barrel.
Looking sharp. Can’t wait for a right side charge for my new lynx lower
If you want to go with a rifle length gas system and a pencil barrel, you may want to wait on the SBI DI BCG. When testing was done on an early production version of a competitor's piston 180 firearm that used a rifle length piston and gas block hanging off a pencil barrel developed an MOA spread on rapid fire, similar to when a heavy suppressor is fitted on a What Would Stoner Do Pencil-barreled AR-15. The competitor has increased the barrel's thickness beyond pencil to compensate. If there is only a lighter AR-15 style gas block and a gas tube hanging off a pencil barrel with a rifle length gas port on a Lynx, it should not have any issue. A carbine length piston and AR-18 type gas block on a carbine length gas-ported pencil barrel is unlikely to have the issue either, as that brings things closer to the gun's center of gravity, and thus no problems have been reported from anyone putting a pencil barrel on a 180 variant with a carbine length port, to my knowledge.