The article listed some intriguing requirements. The new gun would have to:
1. Blast through enhanced armor at 2,000 feet away.
2. Have the new weapon will weigh less than 12 pounds and the new ammo to be 20 percent less than an equal brass case weight.
3. With the buttstock down, it would be 35 inches long or less.
4. The rate of fire will be 60 rounds per minute with 3-round burst for 15 minutes without a barrel change or cook-off.
There were more requirements listed but just these are pretty ambitious.