This works for me:
Ultra Long Range: .50 BMG Barrett M82A1
Long Range: SAR-3, LSR (Argentinian FAL), SA M1A1 Bush Rifle, Savage 110s (.308 & .300 Win Mag), .303 Enfield No.4 MkII, 8mm M48A Mauser, M91 Moisin-Nagant
Medium-Long Range: .375 H&H Mag Winchester M70, .45-70 Ruger No. 1
Intermediate Range: Colt 6520, Colt 6551, Bushy Dissipator, Bushy M4 Clone, Bushy M17S, DPMS Lo-Pro Classic, Eagle Arms EA15 HBAR, Galil AR & ARM (5.56), Daewoo K2 & K1A1, FNC, Steyr AUG, HK93A3, HK SL8-1, Mini14, Mini14 Ranch, Armalite AR-180B, PolyTech Legends AKS Folder, Hungarian FEG SA-85, Robinson M96 Recon Carbine, 5.45 Romanian SAR-2, .223 Saiga, PolyTech SKS
Short Range: HK94A3, Calico M900, Action Arms UZI Carbine (9mm/.41AE)
CQB Range (<25m): Benelli M3, SPAS-12, Win 1300 Defender, Moss M500 Bullpup, Moss M500 Cruiser, HK SP89, 9mm UZI Pistol, Calico Pistol
Hanguns: Beretta 92F, SIG P229, HK USP Tactical, Colt Double Eagle, SA M1911A1, Colt 1991 Commander, Glock 24C, Glock 30, S&W 1006, S&W 29, S&W 66, Taurus 85, Rossi 971, Desert Eagle Mk VII .44 & .357, Jericho 941, Ruger P85 MkII, Ruger MkII, .45 Colt Ruger Blackhawk, T/C Stainless Contender (.44/.30-.30/10mm/.223), Walther PPKS, 9mm Broomhandle Mauser, FN FiveseveN USG
I'm probably missing some but you have an idea of my set-up. The down-side is ammunition logistics.