upper

Hi Community, New poster here. I own a P226 from Sig and am quite happy with it, so I'm looking to add an AR-15 to my collection and thought about sticking to Sig. Back in 2013, someone had this exact question here: M400 Proprietary upper/lower? The article was extremely helpful for me...

Hello Guys, I have been on the AR scene for a while now but just now really getting into mods. Question I have is, does anyone know how to find one of Sig's lo pro/rail height gas blocks like the ones used on the SRP and Patrol models? I know you can google search and find about 500 different...