Here are some of the newly added weapons

there are the halo 3 weapons in reach but some were deleted from reach

DMR

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it is the New Battle rifle or BR. the BR was a popular gun in halo 3 and i dont know why they got rid of it  no one knows. but it might come back  one day. the DMR is a i shot gun it kills in 5 shot one needs to hit the head if all hit head it is 4 shot.

Grenade Launcher

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this is  one of the new weapons added to halo. it is like the brute shot only not as acurate. this gun can be handly at times to help you in the campagin and even

Target Locator

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is the new weapon to take out big armys and tanks. what it does is you have to aim at the object and then hold the RT butten untill you hear a click and then missals come from the sky. its a beast

Needle Rifle

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the needle rifle is one of the best guns they made for reach. it is used in MLG and most game types. its the same type of gun as DMR. what i mean as it fires the same. this gun at some points even the shots exploed it depends on how many shots you fire.