Don't know what it is, but I have done & bought a few, 4. There is net(U-Tube) instructions for the '15 min home AR trigger job', it takes casual owners more than 15 min though. I have done one, don't have the new poundage here, but it did come down from stock. My idea was to try it, & then buy an after-market if things didn't work out. So far I have left my 15 min home job in place.
I also have a Timney, Jewel, & RRA-NM triggers. The simple choice for the average hunter & shooter is a Timney, one can split hairs on slightly better triggers, but the Timney is much improved over stock. I wouldn't spend $$ on the RRA-NM trigger, to close to stock. I have the #3 lb Timney skeleton trigger.