Sling attachment guidance for the M16 A1 / A2 / A4. Check your exact configuration and both connectors before choosing the McLean Dynamic Retention Sling (DRS). Factory attachment points do not by themselves confirm a direct fit.
Front attachment
Front sling swivel — factory attachment point.
U.S. Army TC 3-22.9 lists a sling swivel as part of the barrel assembly on the service rifle and refers to it as the front sling swivel. The Marine Corps M16A2 marksmanship manual calls the same fitting the upper sling swivel. It is a fixed swivel loop for webbing or a hook, not a push-button QD socket.
Factory attachment point: confirm the connector fits and closes fully on the exact attachment. The existence of a loop does not establish McLean connector clearance.
Rear attachment
Fixed-buttstock rear sling swivel — factory attachment point.
The Marine Corps M16A2 manual describes a rear, or lower, sling swivel at the butt of the fixed stock, to which the issue sling’s J-hook attaches. A rifle converted to a collapsible buttstock no longer has that fitting and must be assessed by the stock installed.
Factory attachment point: confirm the connector fits and closes fully on the exact attachment. The existence of a loop does not establish McLean connector clearance.
Why this sling on the M16 A1 / A2 / A4
An AR spends far more time carried than fired — on a patrol, walking a treeline, working a barricade. The problem a two-point solves badly is the transition: loose enough to shoulder fast, and it swings when your hands are busy. Cinched retention fixes that without a second sling.
The McLean design is a two-point sling with a patented retention system: it cinches tight to hold the rifle against your body hands-free, then releases into a ready position in one pull. It ships in one size and adjusts, so there is no length to choose.
Fitting it
- Clear the rifle. Unload and clear it following the firearm manufacturer’s instructions before fitting any accessories.
- Front: confirm a compatible connector and follow the sling and attachment manufacturer instructions.
- Rear: confirm the matching connector for your stock or rear attachment; do not assume a slot, stud and QD cup are interchangeable.
- Adjust wearing your kit. A setting dialled in without a vest comes up short once it is on.
- Check the transition. It should shoulder without pulling tight across your chest.
Choosing hardware for your configuration
The cited Marine Corps manual covers the M16A2. Army TC 3-22.9 covers the M16-series rifle and M4-series carbine together and notes that M16-series rifles have either a fixed buttstock or a collapsible buttstock applied by modification work order. Commercial M16-pattern rifles and retro builds should be checked for the parts actually fitted.
Both original fittings are swivel loops. A push-button QD swivel will not connect to them without an adapter, and an M16A4 rail handguard adds a Picatinny interface that still needs its own mount. Compare the swivel opening with the sling’s webbing width or hook before ordering.
Questions
Does the McLean Dynamic Retention Sling (DRS) fit the M16 A1 / A2 / A4?
Compatibility depends on the exact configuration and connectors. Confirm both attachment points and the connector fit before ordering. A factory attachment point does not by itself confirm a direct fit for the McLean sling.
Do I need a snap hook for the front of my M16 A1 / A2 / A4?
The McLean sling already carries a front hook. Choose a compatible attachment loop or swivel for that hook, and confirm its clearance and closure on your exact setup before buying additional hardware.
What do I need to buy for the M16 A1 / A2 / A4?
Front: Factory attachment point: confirm the connector fits and closes fully on the exact attachment. The existence of a loop does not establish McLean connector clearance. Rear: Factory attachment point: confirm the connector fits and closes fully on the exact attachment. The existence of a loop does not establish McLean connector clearance.
What length sling do I need for the M16 A1 / A2 / A4?
There is no length to choose. The sling ships in one size and adjusts, so the same sling covers carry and cinched retention. Set it wearing the kit you actually carry in — a setting dialled in without a vest or heavy coat comes up short once it is on.
Manufacturer and attachment references
Other firearms we have fitment for
Daniel Defense DDM4 V7
AR Pistol
BCM RECCE-16
Ruger AR-556
Springfield Armory SAINT
Firearm photos: M16 A1 / A2 / A4 — Armémuseum (The Swedish Army Museum), CC BY-SA 4.0 (Single side selected from the original two-view image; background removed; proportionally resized and centered on a transparent 1536 × 768 canvas.); Daniel Defense DDM4 V7 — Daniel Defense, Used with manufacturer permission (Background removed; image resized and centered.); AR Pistol — Sturm, Ruger & Co., Manufacturer image used with permission (Background removed; proportionally resized and centered on a transparent 1536 × 768 canvas.); BCM RECCE-16 — Bravo Company USA, Used with manufacturer permission (Background removed; image resized and centered.); Ruger AR-556 — Sturm, Ruger & Co., Manufacturer image used with permission (Background removed; proportionally resized and centered on a transparent 1536 × 768 canvas.); Springfield Armory SAINT — Springfield Armory, Manufacturer product image (Background removed with segmentation and reviewed manual mask corrections; subject cropped, proportionally resized and centered on a transparent 1536 × 768 canvas.); Smith & Wesson M&P15 — Smith & Wesson, Manufacturer image used with permission (Background removed; proportionally resized and centered on a transparent 1536 × 768 canvas.); M4 Carbine — Photo Courtesy of PEO Soldier (U.S. Army), Public domain (Background removed; proportionally resized and centered on a transparent 1536 × 768 canvas.).
