Description
Made in Hartland, WI, the BCM Mod 2 Widebody stock kit updates the M4-style stock with a recontoured semi-clubfoot profile for improved ergonomics and a snag-free exterior. The Mod 2 fits on Mil-Spec carbine receiver extensions and is optimized for intermediate length receiver extensions including MK2, AR10 and A5 platforms. The kit retains BCM’s patented internal latch system (United States Patent Number: D901616) and includes ambidextrous, rotation-limited QD capability.
Key Specifications
- Includes BCM Stock Mod 2 – Flat Dark Earth as the primary stock component.
- The kit contains a BCM MK2 receiver extension made from 7076-T6 and featuring an 8-position, Mil-Spec diameter.
- The MK2 receiver extension is approximately 3/4″ longer than carbine length for intermediate-length optimization.
- Includes a BCM MK2 Mod 1 T0 buffer with an approximate weight of 3.8 oz.
- Includes a Mil-Spec M16A4 rifle action spring as part of the kit.
- The kit provides an BCM EPM4 end plate that includes a mount for a QD swivel.
- A locking (castle) nut for M4-spec assemblies is included in the package.
- The stock features a patented semi-clubfoot contour (D901616) designed to reduce snag points and improve prone position handling.
- The Mod 2 stock incorporates an end-user removable buttpad and an improved VBOST sling retention point with additional web sling attachment slots.
The BCM Mod 2 Widebody stock kit provides a practical, durable upgrade for carbine platforms and intermediate-length builds where improved ergonomics, durable materials and practical sling/attachment options are priorities. Its snag-resistant profile, MK2 receiver extension and included components make it well suited for users seeking a reliable, thoughtfully designed stock solution for duty, range, or field use.





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