I feel like there isn’t, but there are so few weapons available to use it feels like there should be more. There are only like, 4 or 5 covenant weapons (including sword), not really any brand new UNSC weapons except for those that replace old ones (Bulldog, Sidekick, Commando replacing DMR), but dropped a whole bunch like grenade launcher, railgun, SMG, and splaser. Almost all old covenant weapons are missing except the plasma pistol, and no old forerunner weapons exist, only the weird heatwave.
I seriously hope there are more weapons to come, seeing as there are only some 20 weapons (I haven’t used many of the Brute weapons yet though) while other games have 25+ weapons. There are some pretty basic weapons missing so far, so I think there must be more coming. I would be very disappointed if there wasn’t, but I guess we will have to wait, and there are some weapons not available to use yet, but they are included in the 20 weapons counted.
I, like may others (I assume), love the original Battle Rifle! Cool to see it back.