Discussion Starter · #1 ·
I have a Green Label Colt AR15 with an M4A1 14.5" barrel Knights RIS upper. I got the upper from a Colt employee who told me it was from the 1st run for Spec Ops/ CIA going into the Middle East back then. My question is will an H&K 416C 10.5" Barrel fit directly onto the Colt Green Label ( no sear block ) SEAR lower? From what I read on some of the post I think the answer is yes but I want to make sure. I also have a Colt SEAR gun in 9mm 10.5" barrel and am able to switch my registered SEAR from .223 Colt to the 9 MM Colt and they both work fine. If anyone can verify that the 416C will switch out to the H&K upper I would really appreciate it. Thanks...