Lance Rankin here, gunsmith at Western Sport in Roanoke, Texas. Customers ask me all the time what upgrade will tighten their groups. They expect me to say a trigger or a new optic, and sometimes that’s the answer. But the most overlooked accuracy upgrade on most rifles costs less than a case of ammo: a good two-point sling, set up right and actually used.
A sling is not a carry strap
Most shooters treat the sling as a way to keep the rifle off the ground between drills. Used properly, it’s a shooting aid. Tension the sling against your body and you’ve added a fifth point of contact that pulls the rifle into you and shrinks your wobble zone. That’s mechanical leverage, not comfort. Competitive shooters and the military have leaned on sling tension for over a century because it works.
What a good sling has to do
Three jobs, in order. First, retention: when you let go of the rifle to open a door, help a kid, or go hands-on with anything, the gun stays put in a predictable position with the muzzle somewhere safe. Second, stability: cinched tight, the sling anchors the rifle in prone, kneeling, and improvised positions, and keeps it pinned between shots so your follow-ups come faster. Third, a quick way out: quick-detach swivels or a fast adjuster so you can ditch the sling if you end up tangled or on the ground. Don’t skip that last one.
Getting the tension right
The most common mistake I see is running the sling way too loose, like a guitar strap. With a modern adjustable two-point, keep the adjuster tab where your hands already work, near the front of the receiver. You want to be able to crank it uncomfortably tight for a braced shot, then pop it loose in one motion to move or transition. If you have to hunt for the adjuster, it’s mounted wrong.
Prone with a tensioned sling
Here’s where people get surprised. Loop up tight in prone and the rifle stops behaving like a rifle and starts behaving like it’s bolted to you. Recoil has nowhere to go, the dot settles almost immediately, and prone stops being the slow position. If you shoot a red dot, watch how fast it returns to the target with real sling tension versus without. That comparison sells more slings in my shop than I ever could.
Two-point beats single-point
I’ll be blunt: single-point slings are convenient right up until they aren’t. The rifle swings free when you drop it to work with your hands, which is bad for your knees and worse for muzzle discipline. A two-point adjustable gives you nearly all the mobility with far more control and stability. It’s the right answer for almost everyone, which is why it’s what I put on my own rifles and what I recommend in my home defense AR-15 setup guide.
Practice the boring part
Spend some dry-fire time on carry positions: high carry, low carry, high ready. Muzzle safe, rifle ready, no snagging. If your chin bangs the stock or the sling fights your head position when you mount the gun, change the carry height or tension until it doesn’t. A correct setup disappears; a wrong one nags you every rep.
Bottom line
Before you spend $200 chasing accuracy through parts, spend a third of that on a quality adjustable two-point and an afternoon learning to use it. If you’re still assembling your rifle, my AR-15 build guide covers where sling mounts fit into the plan, and we stock slings and mounting hardware in the store. Questions about setup on your specific rifle? Call me at 817-393-4000; this is the fun part of the job.
Lance Rankin is the owner and Chief Gunsmith of Western Sport, a family-run Type 07 FFL and Class 3/SOT dealer in Roanoke, Texas, serving shooters since 2007. Born and raised in Texas with over 50 years of experience handling firearms, Lance purchased Western Sport in 2017 and turned his lifelong passion into his profession. He specializes in AR-15 and AR-10 platform rifles, manufactures Western Sport’s own AR-15 line under the Rankin Industries brand, and runs the shop’s in-house Cerakote coating operation. When he’s not behind the counter or the workbench, you’ll find him on his ranch deep into the night, hunting coyotes with an AR-15 and thermal optics. Lance holds an MBA and personally shoots and tests the products Western Sport sells.
