The phrase "a pair of grenades" is correct and usable in written English.
It can be used when referring to two grenades as a unit or set, often in a military or action context.
Example: "The soldier was equipped with a pair of grenades for the mission ahead."
Alternatives: "two grenades" or "a duo of grenades."
"We had basically one rifle, two machine guns, and a pair of grenades.
On Mexico's independence day, men apparently linked to drug cartels threw a pair of grenades into a festive crowd, killing eight and maiming dozens.
Note also the use of "just as" moments: one guy, trapped on the ground, is stamped on by a foot the size of an R.V. just as he is about to be yanked free; and a tail bats a prospective hero sideways into a cliff just as he is about to pull the pin on a pair of grenades and save the day.
Lang burst out of the room with a pair of grenades cocked in his hands.
"For an area like this, a thousand men is nothing," Lieutenant Arenas said as his gunboat, the A.R.C. Leticia, equipped with two cannons, two machine guns and a pair of grenade launchers, chugged up the Putumayo River, with only the sound of its motors breaking the quiet.
A pair of grenade attacks in downtown areas killed one and injured dozens more in October.
On Wednesday, one pro-government gunman near the sand-bagged entrance to the Tadamun district sported a T-shirt, jeans and sandals, with the only sign of authority being a pair of hand grenades and a pistol tucked into his belt.
She added a Yankee cap, a medallion in the shape of a hand grenade, and a pair of blue suède sneakers.
In the video that Barrus posted on YouTube (41,960 views), the camera homes in on a pair of pods, positioned starkly on a tabletop as though they were hand grenades seized by sheriffs' deputies in a weapons bust.
As it turned out, Shareef was so broke that he intended to hock a pair of stereo speakers to raise the $50 for each of the fake grenades JTTF agents offered to sell him.
