The ProMag Ambidextrous Dual Sling Plate (part no. PM140A) replaces the standard AR-platform end plate with a version that adds a sling attachment loop on both sides of the buffer tube. ProMag builds it from steel so it holds up to the same abuse as the castle nut and end plate it’s replacing. Having sling loops on both sides means a left-handed shooter or anyone who switches shoulders isn’t stuck with a mount that only works on one side. It’s a straightforward swap at the back of the receiver extension, no new hardware required beyond what’s already on the lower.

Key Specifications

• Functions as an AR-platform end plate, replacing the standard castle nut end plate.
• Ambidextrous design adds a sling loop on both sides of the buffer tube.
• Built from black oxide-finished steel for durability at a high-stress mounting point.
• Mounts at the rear of the receiver extension, using the factory castle nut.
• Ships at 0.06 lb, adding almost nothing to your order.
• Replaces a standard 4- or 6-position collapsible stock retaining plate, not just a fixed end plate.

Frequently Asked Questions

Does this plate work for left-handed shooters? Yes, it’s ambidextrous with a sling loop on both sides of the buffer tube.

What is this plate made of? Steel, matching the durability of the castle nut and end plate it replaces.

Buy the ProMag Ambidextrous Dual Sling Plate

A single-sided sling mount is a hassle the moment you switch shoulders or hand a rifle to someone else, and this dual-sided plate solves that with a simple end-plate swap. Order it from our Lubbock, Texas gun shop and it ships fast to your door, along with more AR-15 lower parts.