Used PSA AR-15 556 7.5in pistol with brace. Key-mod rail with picatinny attachments. Sight mark solar red dot. Magpul grip with storage and angle forgrip. Strike Industries SI-BTG-COBRA
Cobra Billet Aluminum Trigger Guard. Single point sling. Knock off scout light with pressure switch. Here's the deal with the Atrius safety selector. Will probably need a different buffer. It works flawlessly in semi and will get about a ten rd burst on super safety before a dead trigger. Buffer weigh is the common fix. 650 with the Atrius Safety or 550 with a mill spec safety  four17 234ten38  

https://www.classicfirearms.com/atrius-forced-reset-selector-single-side-safety-lever-drop-in-installation-works-any-standard-milspec-trigger-made-in-the-usa-adg-frs-s/