ProMag PM140A Ambidextrous Sling Attachment Plate

The ProMag PM140A is an ambidextrous dual-loop single-point sling attachment plate designed to replace a collapsible (4- or 6-position) buttstock retaining plate on AR-pattern rifles. It provides a pair of loops that accept hook-style single-point sling hardware and allows the rifle to be carried on either the right or left side. Constructed of carbon steel with a black-oxide finish and manufactured in the United States.

Key Specifications

• Model listed as Sling Attachment Plate.
• Manufacturer part number reported as PM140A.
• Material is specified as Steel.
• Finish described in source text as black-oxide.
• Hand is listed as Ambidextrous.
• Product type identified as Sling Adapter.
• Designed to fit AR-pattern rifles.
• Feature noted: Replaces butt stock retaining plate.
• Weight reported as 0.06 (value provided in source data).
• Dimensions reported as Length 2, Width 2, Height 0.1 (values provided in source data).

Durable and straightforward, the PM140A provides an ambidextrous mounting point for single-point sling systems while replacing the standard collapsible stock retaining plate on AR-pattern rifles. Its simple dual-loop design integrates with hook-style sling hardware and the black-oxide carbon steel construction offers practical corrosion resistance for regular field or range use. For builds or upgrades that require a reliable, compact sling attachment solution, this plate offers a direct replacement that supports ambidextrous carry and single-point sling configurations.