The phrase "a side arm" is correct and usable in written English.
It can be used to refer to a secondary weapon, typically a handgun, that is carried in addition to a primary weapon.
Example: "The officer was equipped with a side arm for personal protection while on duty."
Alternatives: "secondary weapon" or "handgun".
Sgt. First Class Gary DeCola, a National Guardsman with a side arm, was on the alert for terrorist activity.
FOR a quarter-century, the shotgun has been the weapon used by Danbury police officers when they have needed something more powerful than a side arm.
Another potential danger is that former rebels admit that, while they have handed in most of their weapons, many have kept a side arm.
At one, a sergeant of about thirty, who carried a side arm and wore a round helmet covered in black mesh, inspected my American passport, handed it back to me, and said, enigmatically, "Osama bin Laden".
In one case, an officer drew a side arm after being struck on the head with his own baton, said Pete King, a spokesman for the university president, Mark G. Yudof.
A model is presented to predict the flow split of horizontal air-water annular flow at a T-junction with a side arm at an arbitrary inclination to the horizontal.
There is a big difference between facing a side armed with a fancy playbook and the ambition to attack from deep, and taking on a team of reigning champions who generate such massive amounts of horsepower: who, rather than looking to outstrip their opponents with magical sleight-of-hand trickery, simply seek to out-muscle them.
Malinga, a boy from the beach, slings the ball with a side-arm action like a discus thrower on steroids.
Pettitte heard Derek Jeter shout that Sweeney was running, stepped off the rubber, and made a side-arm toss to catcher Jorge Posada.
"Nobody wants to be the guy who lets the rest of the team down," said O'Day, a side-arming right-hander.
Post-SSF, the solid residue was separated from the fermentation broth via vacuum filtration using a Büchner funnel fitted with Whatman Grade 1 filter paper (Sigma Aldrich, WHA1001150) and a side-arm flask.
