Threads

Something I've noticed from the pictures I'm seeing this year, is a lot more new pistols being shown at SHOT with extended and threaded barrels.

Such as the new Sphinx polymer gun (Photo and more at Gear Scout)

It's good to see more and more guns coming out "suppressor ready," and a lot more people accepting suppressors not as a piece of assassin kit, but merely another bit of safety equipment.  Now to get Washington to realize that...