I have a Rifles Only cover for my Griffin Recce 7 but decided to get an Armageddon cover for it also. I have an AEM5 for a Mk12-inspired rifle that I also use on a Recce style rifle.
Sort of an early-2000s SEAL Recon rifle. McKay M16A2 lower, older BCM upper, 16" mid-gas Douglas match barrel, KAC Rifle RAS, Tango Down BG17 grip, Mil-spec 6-position buffer tube w/8.5 oz. XH buffer and Wolff spring, B5 Enhanced SOPMOD stock, Colt M16 BCG, Colt parts kit, Colt ambi safety, KNS Precision hardened SS safety detent, AXTS Raptor ambi charging handle, Norgon ambi mag release, Magpul winter trigger guard, Geissele SSA trigger, KAC 600m rear sight, KAC M4 NSN front sight, Nightforce NXS 2.5-10x24mm Compact illuminated Mil-R scope in a Nightforce 20 MOA UniMount, Atlas PSR bipod w/A.R.M.S. #32 QD mount, Allen Engineering AEM5 w/Ops, Inc. 12th model muzzle brake and collar, and a vintage Surefire M951 with a Malkoff M61N LED drop in.
The Recce 7 is shorter than the AEM5 (7.6" vs 8.8") but I think that Rifles Only cover may work for it, leaving the part over the barrel uncovered.