Comparison between AR-15 and HK416 post-A3 trigger group, color-coded. All components shown are trigger in blue, sear release rocker in cyan, disconnector in green, hammer in red, hammer bushing in orange, and bridge in yellow.<br>Note that the AR-15 one is a semi-auto trigger group, while HK416 and its semi-auto counterpart MR223 and MR556 uses the same full-auto style trigger group, and achieve semi-auto only function with different a bolt carrier and the lack of an auto sear.
<a href="//commons.wikimedia.org/w/index.php?title=User:Andy_Sou&amp;action=edit&amp;redlink=1" class="new" title="User:Andy Sou (page does not exist)">Andy Sou</a>
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<span class="int-own-work" lang="en">Own work</span>