Jasman Toys
From Halopedia, the Halo wiki
According to a Bungie update posted by lekum, there will be Halo 3 Replicas Guns! Bungie has spoken to folks from Jasman Toys and they will be showcasing the new Halo 3 Laser Tag Replicas. Bungie concentrate mostly on realism and the guns won't be a 1:1 scale, since the Master Chief is 7 feet tall, and to have a 1:1 scale of the gun he carries would be too large and too heavy for the normal-sized adults. Instead, they lowered the scale by just a little. It is also assumed that these will be used as Laser Tag toys. If you are planning to find the replicas at the 2007 ComiCon, the prototypes will be on display at the Tor booth (#1116).
Laser Tag
At the Q&A, Bungie announces, "Our Halo Laser Pursuit differs in the way that it is trying to replicate the game instead of just having your basic laser tag game. The target will represent the shields similar to the game. When you are shot the target will show the damage to your shield, if you can get away the shields will recharge back to full power just like Spartans."
UNSC Weapons
Bungie, however, is still working on Human weapons, because they want the UNSC weapons to be more realistic, but less dangerous-looking so the police won't shoot you. Bungie says, "Our Halo 3 Laser Pursuit replica weapons are going to be available at toy stores and we wanted to keep the detail as realistic as possible. The human weapons look too real and would need to be made in bright orange or green to be sold at retail. Depending on the success of the alien weapons, however, who knows what could happen."
Production Line in 2007
According to Bungie, the plasma rifle will have lights and recoil similar to those in the game. It will also have the real sound effects from the game as well as some of the special features including the “overheating” when shot too many times in a row. The plasma pistol will also have the lights and sounds as well as a recoil vibration when shooting and a “super shot mode” when holding down the trigger that will do more damage.
Where to Buy
"The Covenant Plasma Rifle and Plasma Pistol will be available at your local Hot Topics and other fine retailers starting October 2007." says Bungie, at a Q&A, "The Covenant Energy Sword will be available sometime in 2008."