Big Guns have a very high damage potential. They are quite bulky, so you better be quite strong to bring along both weapon and a good deal of ammo.
Machine Guns
                
                  M60. This relatively light
                  machine gun was prized by militaries around the world for its
                  high rate of fire. This reliable, battlefield-proven design,
                  was used on vehicles and for squad level fire-support. Min
                  ST:7. It weighs 30 pounds. Burst :30 rounds, Ammo: 30-100rd clip, OR 150-200rd Drum x 7.62mm
                  
                  Damage/Range: Point Blank:
                   36 dmg, 
                  
Sml: 100yds(x3yds)=27 dmg,
                   
Med: 200yds(x6yds)=18 dmg,
                    
Lng:300yds(x9yds)=9 dmg, 
                    
                
                  Light Support Weapon. This
                  squad-level support weapon has a bullpup design. The bullpup
                  design makes it difficult to use while lying down. Because of
                  this it was remanded to National Guard units. It, however,
                  earned a reputation as a reliable weapon that packs a lot of
                  punch for its size. Min ST:6. It weighs 22 pounds. 
                  Burst :33 rounds, Ammo: 30-100rd clip, OR 150-200rd Drum x 5.56mm
                  
Damage/Range: Point Blank:
                   28 dmg, 
                  
Sml: 150yds(x2yds)=21 dmg,
                   
Med: 300yds(x4yds)=14 dmg,
                    
Lng:450yds(x6yds)=7 dmg, 
                    
                
                  Bozar. The ultimate refinement of
                  the sniper's art. Although, somewhat finicky and prone to
                  jamming if not kept scrupulously clean, the big weapon's
                  accuracy more than makes up for its extra maintenance
                  requirements. Min ST:6. It weighs 22 pounds. Burst :25 rounds, Ammo: 30-100rd clip, OR 150-200rd Drum x 7.62mm belt. 
                  Damage/Range: Point Blank:
                   40 dmg, 
                  
Sml: 200yds(x1yds)=30 dmg,
                   
Med: 500yds(x3yds)=20 dmg,
                    
Lng:700yds(x5yds)=10 dmg, 
                    
Heavy Guns
                
                  Flamer. A Flambe 450 model
                  flamethrower, varmiter variation. Fires a short spray of
                  extremely hot, flammable liquid.  The flamethrower canisters only hold 
                  fuel for 5 shots, Min ST:6. It weighs 28 pounds.
                  
                  Damage at Range: 
                  
Point Blank: 3dmg/rd for 5rds , 
                  
Sml: 15yds(x3yds)=3dmg/rd for 3rds @ 3yrds,
                   
Med: 30yds(x6yds)=3dmg/rd for 2rds @ 6yrds,
                    
Lng:45yds(x12yds)=3dmg/rd for 1rd @ 9yrds 
                
                  Avenger Minigun. Rockwell
                  designed the Avenger as the replacement for their aging CZ53
                  Personal Minigun. The Avenger's design improvements include
                  improved, gel-fin, cooling and chromium plated barrel-bores.
                  This gives it a greater 
Range and lethality. Min ST:7. It
                  weighs 30 pounds. Burst :110 rounds, Ammo: 120 x 10mm belt 
                  
                  Damage/Range: 
                  
Point Blank:
                   50 dmg, 
                  
Sml: 100yds(x6yds)=37 dmg,
                   
Med: 200yds(x9yds)=25 dmg,
                    
Lng:300yds(x12yds)=12 dmg
                
                  Vindicator Minigun. The German
                  Rheinmetal AG company created the ultimate minigun. The
                  Vindicator throws over 90,000 caseless shells per minute down
                  its six carbon-polymer barrels. As the pinnacle of Teutonic
                  engineering skill, it is the ultimate hand-held weapon. Min
                  ST:7. It weighs 30 pounds. Burst :200 rounds, Ammo: 100 x 4.7 mm Caseless Belt 
                  
                  Damage/Range: 
                  
Point Blank:
                   60 dmg, 
                  
Sml: 100yds(x6yds)=45 dmg,
                   
Med: 200yds(x9yds)=30 dmg,
                    
Lng:300yds(x12yds)=15 dmg
          
           
                    
            M79 Grenade Launcher. M79 Grenade 
                      Launcher. A single shot grenade launcher. Min ST:5. It weighs 
                      4 pounds.
Range: Sm:30yrds, Med:60yrds, Lng:100yrds,
                      
                      Damage within Radial Area of Effect: 5dmg @ 3yrds, 3dmg @ 6yrds, 2hlth @ 9yrds
 Ammo: 1 x 40mm Grenade
          
        
                 
                
                  Rocket Launcher. A Rockwell
                  BigBazooka Rocket Launcher. With the deluxe 3 lb. trigger.
                  Fires AP or Explosive Rockets. Min ST:6. It weighs 18 pounds.
                  
Range: Sm:40yrds, Med:80yrds, Lng:120yrds,
                      
Damage within Radial Area of Effect: 
                      15dmg @ 3yrds, 10dmg @ 6yrds, 5dmg @ 9yrds,  5hlth @ 12yrds
                       
**15 yrd Rear Damage Area: 2dmg!**
						
 Ammo: 1 x Rocket (AP or explosive)