Midwest Industries Alpha M4 Beam Folding Stock Adapter, Black Steel, 1913 Picatinny

The Midwest Industries Alpha M4 Beam Folding Stock Adapter (brand part no. MIALPHAM4BSF) is a black steel, side-folding mechanism that lets a mil-spec-diameter buttstock fold flat against a 1913 Picatinny rail. Midwest Industries machines the mechanism from 4140 steel with a full-length locking lug and a steel clamp with a large surface engagement area, delivering a solid, positive lockup in both the open and folded positions. The modular design accommodates a range of different stock attachments and can be configured to fold to either the right or left side.

Key Specifications

• Machined from 4140 steel for durability.
• Full-length locking lug for maximum strength.
• Solid, positive lockup in both the open and folded positions.
• Steel clamp with a large surface engagement area.
• Configurable to fold to the right or left side.
• Modular design accommodates different stock attachments.
• Includes two QD sling attachment points.
• Compatible with mil-spec diameter buttstocks.
• Curved top mitigates wobble from the skeletonized beam.
• Adds 7.0 inches to overall firearm length when deployed, and 0.75 inch when folded.

Frequently Asked Questions

What stocks is this adapter compatible with? Mil-spec diameter buttstocks.

Can it fold to either side? Yes, it can be configured to fold to the right or left.

How much length does it add? 7.0 inches deployed, and 0.75 inch when folded.

Buy the Midwest Industries Alpha M4 Beam Folding Stock Adapter

Add a folding capability to your mil-spec-diameter stock. Order it from our rifle stocks selection at our Lubbock, Texas gun shop for fast, direct shipping.