The Daniel Defense MFR Rail QD Sling Mount is a steel M-LOK sling mount for Daniel Defense MFR and Omega rails — and the push-button QD sling swivel is not included.
Two Daniel Defense sling mounts look almost identical in a photograph and differ in one important way. This part, 03-021-15136, is the mount by itself — you supply the push-button QD swivel, or move one across from another rifle. The Rail Mount QD Swivel Attachment Point, 03-021-30029, comes with a push-button QD sling swivel already in the box, and clamps to Picatinny rather than M-LOK. If you have no swivel, choose that one.
What this mount does well is disappear. It is made entirely from steel with a heavy manganese phosphate coating, weighs 0.3 oz (9 g), and has a limited-rotation interface so the sling point cannot spin under load. Mounting positions are provided at the front and rear on both sides of the rail, which gives four sensible places to hang a sling and keeps the attachment tangle-free. A 1/8" Allen wrench is included, and it is made in the USA.
Key Features
- Swivel not included — this is the mount alone — the push-button QD swivel is supplied separately
- All-steel construction — a sling point carries the whole weight of the rifle
- Heavy manganese phosphate coating — a corrosion finish, not a paint
- Limited rotation — the sling point cannot spin around under load
- 0.3 oz (9 g) — essentially free weight on the handguard
- 1/8" Allen wrench included — nothing else to buy to fit it
Compatibility & Fitment
Daniel Defense lists this mount as compatible with the Daniel Defense MFR Rail, the Omega Rail and the DELTA 5 stock, and not compatible with the MFR XL Rail, DD5 rails, or other manufacturers' M-LOK systems — so treat it as a Daniel Defense rail part rather than a universal M-LOK accessory, and check your handguard before ordering. Mounting points are at the front and rear on both sides. A push-button QD sling swivel is required to attach a sling and is not supplied; if you would rather have the version that includes one, choose the Daniel Defense Rail Mount QD Swivel Attachment Point instead, which mounts to Picatinny and ships with the swivel.
Technical Specifications
Platform | AR-15 / M4 |
Fits | Daniel Defense MFR Rail, Omega Rail and DELTA 5 stock — not the MFR XL, DD5 rails or other manufacturers' M-LOK |
Type | M-LOK QD sling mount — swivel not included |
Material | Steel |
Finish | Heavy manganese phosphate |
Weight | 0.3 oz (9 g) |
Mount Interface | M-LOK, limited rotation; push-button QD swivel socket, swivel not supplied |
Made in | USA |
Brand | Daniel Defense |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Does this include the sling swivel?
No. This part number, 03-021-15136, is the mount on its own and you supply the push-button QD swivel. The Daniel Defense part that does include a swivel is the Rail Mount QD Swivel Attachment Point, 03-021-30029, which comes with a push-button QD sling swivel and clamps to Picatinny rather than M-LOK.
Will it fit any M-LOK handguard?
No, and this is the thing to check first. Daniel Defense lists it as working with the MFR Rail, the Omega Rail and the DELTA 5 stock, and as not compatible with the MFR XL Rail, DD5 rails or other manufacturers' M-LOK systems. If your handguard is from another brand, ask us before ordering.
Where on the rail can it go?
There are mounting points at the front and rear on both sides, so you have four sensible positions. The interface is limited-rotation, which stops the sling point spinning around when the rifle takes its weight.
What is in the box?
The steel mount and a 1/8" Allen wrench. Nothing else is needed to fit it, but you will need a QD swivel to attach a sling.
