Performance Firearms 6.5 Grendel Mega SBU Upper (milled for left-side charge) Custom Nib Carrier, threaded for charge handle, and Maxim Firearms 9310 Type-II Bolt 24" Lilja double-fluted, hand-lapped AR-24 SS barrel Performance Firearms (Incendia Arms) Billet Lower (w/Ambi Bolt Lock back)...