To get it to run! I installed the PSA adjustable gas block, replaced the aluminum 3 1/4” heavy buffer with a KAK 2 1/2” AR 10 buffer, removed the AR 15 buffer spring and installed a SoringCo orange heavy AR 10 buffer spring. I did a trigger job on the factory stock one which is very nice, Installed the Limb Saver butt pad which is super sweet as well, replaced the original firing pin which I found to be to long with a Wilson Combat heavy duty firing pin. Least of all a Vortex 16x43 mm scope