The upper and lower receivers are drilled out at every opportunity to save weight and CNC machined from billet. It means you get a Geissele match-grade, two stage trigger. Its a Mil-spec style trigger, whatever that is, and its a single stage trigger that works well. This is from the Advanced Armament Corps people, the people that actually invented the ammunition. SFX9 HC 3.25 Solid Frame X-TAC 15 Round, SFX9 HC 3.25 Solid Frame X-TAC 10 Round, California Compliant Protector AR Carbine. Thats wild. Diamondback DB15 .300 AAC Blackout Semi Auto Rifle Diamondback DB15 .300 AAC Blackout Semi Auto Rifle FDE, Black Rain Ordnance Patriot AR-15 .300 BLK Gadsden Flag. When you place your order, you can upgrade yours with a Geissele match-grade two-stage trigger. 9mm AR pistols, burnt bronze high quality Christensen Arms through to Flat Dark Earth PSAs. Now you can buy the The Fix by Q Sniper rifle in 308 Win. Blackout ammunition, together with basically every bulk ammo deal, basically disappeared over the past year. I had trouble sourcing them for a while, so they fell down and off lists, but that was my only issue. Advanced Armament Corporation pulled out all the stops to give you rifle levels of stopping power and accuracy.