The Abode of McThag

Issue timeline:

1977 - M240 adopted with the M1 Abrams MBT coax and pintle mount.  No sights, no stock, clipped pistol grip, no bipod.  Replaces M73 and M219 coaxial machine guns in the M48A5, M60A3 and M551A1 series tanks.  22.2 lb.  28.8 loaded with 100 rounds.

1981 - M240C adopted with the M2 Bradley IFV coax.  Same as M240 except feeding from right side of gun.  Also used coaxially in LAV-25.  22.2 lb.  28.8 loaded with 100 rounds.

1987 - M240E1 adopted for the LAV-25 for pintle mount.  No stock, no bipod, spade grips.  25.7 lb.  32.3 loaded with 100 rounds.

1990 - M240G 'G' for ground.  Pretty much a standard FN MAG achieved in the most roundabout manner possible!  It came into being by the Marines ordering "dismount" kits for their M240E1's and conveniently never mounting the guns to the pintle on top of the LAV.  Eventually someone in Congress caught on that they were stealth-replacing their M60 machine guns and decided to just let them buy complete guns.  25.8 lb.  32.4 loaded with 100 rounds.

1991 - M240N and M240G with different sights and no bipod for mounted use from boats.  24.1 lb.  30.7 loaded with 100 rounds.

1995 - M240D improved version of M240E1 with accessory rail.  22.9 lb.  29.5 loaded with 100 rounds.

1995 - M240B a modified MAG with a handguard/heat shield and an accessory rail, official replacement for the M60.  Still lots and lots of M60's in service in Y2K though.  27.1 lb.  33.7 loaded with 100 rounds.

2010 - M240L an M240B with a titanium receiver.  Does not exist in Twilight: 2000.  22.3 lb.  28.9 loaded with 100 rounds.

2010 - M240P and M240L with a 4" shorter barrel and collapsible stock.  Does not exist in Twilight: 2000.  21.8 lb.  28.4 loaded with 100 rounds with the shorter barrel.