Thanks in advance for any of your comments. I built my kids a 6.8 with a 16" ARP a few years ago for deer hunting and love the gun but now I am wanting to build them another one to shoot suppressed with a 12.5" upper for deer hunting. I got crazy lucky yesterday and bought the ARP 12.5" scout, but did not think everything through. I have been reading all of your post and have a few questions. If I am using a suppressor do I need an adjustable gas block? I am thinking about buying the Silencerco Hybrid, any thoughts or suggestions? Last but not least, after reading your post, I am really confused about how to start buying parts for the lower. This will be a SBA not a pistol. Can I buy standard lower parts or being it is a shorter barrel, I need specific parts for the shorter barrel. I have found stripped lowers that have pistol stamped on it. Do I need a pistol lower work or any lower is ok. Again this is for my kids and does not need top of the line lower parts but i do want to make it a good build. Also any suggestions on triggers and stocks will be appreciated. I am looking at the AAO trigger and the Tailhook MOD 2 but not sure if this the right setup for a hunting rig.