In the context of firearms, a sling is a type of strap or harness designed to allow a shooter to conveniently carry a firearm on their body, and/or to aid in greater hit probability by allowing the firearm to be better braced and stabilized during aiming. Various types of slings offer their own advantages and disadvantages, and can generally be divided into several categories.
An M16A4 and M4 carbine with different slings. The green sling to the left is a traditional two-point sling, while the tan sling to the right is a modern quick-adjustable two-point sling.
Modern quick-adjust two-point sling on an M16A4 rifle.
Three-point sling on a Springfield Armory M1A SOCOM 16 rifle.
A sling attached to a Marlin 25N rifle by using swivel studs screwed into the wood stock, one near the butt of the rifle and the other attached to the forearm.
M-LOK, for Modular Lock, is a firearm rail interface system developed and patented by Magpul Industries. The license is free-of-charge, but subject to an approval process.
Magpul MOE M-LOK handguard on a user-assembled AR-15 semi-automatic rifle
Colt Canada MRR with M-LOK rail handguard
The URG-I variant M4A1 carbine has M-LOK rail handguard with an LA-5C/PEQ on the top rail used by one of the Green Berets from 3rd SFG (A) during training at Marine Corps Air Ground Combat Center, Twentynine Palms, California in 2019
M110A1 SDMR featuring a Geissele M-LOK rail handguard