Caliber: .223/5.56, 6.5 Grendel, .300 AAC Blackout, .22 LR. Combines A-DAC (Ambidextrous Dual Action Catch) system from Radian Weapons with JP Ambi Mag Release. Compatible with any mil-spec pattern upper receiver. Choice of JP Low Mass Operating System, JP Full Mass Operating System, or JP Variable Mass Operating System. Trigger: JP Fire Control Package, 3.0 to 5.0 lbs. Ambi lower receiver. Introduced 2020. SEE POLITICAL PANIC PRICING.