How to Install the Vinkefox Folding Stock Adapter on Your Rifle: A Step-by-Step Guide

install Vinkefox folding stock adapter, AR-15 folding adapter setup, tactical gun modification

Introduction

The Vinkefox Folding Stock Adapter (Patent 8769855) revolutionizes AR-platform portability, allowing your rifle to fold to 16.5 inches for discreet storage. Designed for DIY enthusiasts, this guide combines technical precision from the GEN3-M manual with Vinkefox’s user-friendly engineering. Follow these steps to install your adapter safely and legally—no gunsmith required!

Tools & Preparation

Required Tools:

  • 9/64” & 3/32” Allen wrenches (included with Vinkefox adapter)

  • Flange Tool (provided)

  • Threadlocker (optional, for added security)

Safety First:

  1. UNLOAD your firearm, remove the magazine, and verify the chamber is empty.

  2. Engage the safety and work on a clean, non-marring surface.

  3. Review ATF compliance guidelines here.

Step 1: Disassemble Existing Stock

*(Refer to GEN3-M Manual Pages 1-2)*

  1. Remove Buffer Tube:

    • Use a 9/64” Allen wrench to unscrew the castle nut securing the buffer tube.

    • Slide off the buffer tube and stock assembly.

    • Pro Tip: Place the takedown pin spring and detent in a magnetic tray to avoid loss.

  2. Extract Buffer & Spring:

    • Push the buffer retaining pin and gently remove the buffer and action spring.

Step 2: Install Vinkefox Hinge Assembly

*(Aligns with GEN3-M Step 3)*

  1. Attach Receiver-Side Hinge:

    • Position the hinge assembly (Part 1) over the receiver’s rear takedown pin hole.

    • Align the hinge’s protrusion (marked “X”) with the receiver’s index indentation.

  2. Secure Threaded Flange:

    • Screw the threaded flange (Part 5) into the receiver using the included flange tool (Part 8).

    • Tighten until the tool flexes slightly—25-30 ft-lbs torque is ideal.

  3. Reassemble Button Mechanism:

    • Insert the button (Part 4) and button spring (Part 3) into the hinge.

    • Cover with the side plate (Part 2) and secure using the 9/64” hex screw (Part 6).

Step 3: Mount Stock & Buffer Tube

*(GEN3-M Steps 4-5)*

  1. Lock Flange Set Screw:

    • Use a 3/32” Allen wrench to tighten the flange set screw (Part 7). Snug firmly, but avoid overtightening.

  2. Reattach Buffer Tube:

    • Install the buffer retaining pin and spring onto the stock-side hinge (Part 1a).

    • Screw your buffer tube onto Part 1a, following your rifle’s manual for alignment.

Step 4: Reinstall Action Spring & Bolt Carrier Extension

*(Critical for Reliable Function – GEN3-M Step 6)*

  1. Load Buffer & Spring:

    • Fold the stock and press the button to access the buffer tube.

    • Insert the action spring and buffer, ensuring they clear the retaining pin.

  2. Install Bolt Carrier Extension:

    • Pull the charging handle to expose the bolt carrier group.

    • Insert the Vinkefox Bolt Carrier Extension (Part 9) into the carrier’s rear until it clicks.

    • Note: Rotate the extension while inserting for smooth engagement.

Step 5: Final Checks & Compliance

  1. Test Folding Mechanism:

    • Press the button to fold/unfold the stock 10 times. Ensure smooth operation.

    • Tighten the hinge screw (Part 10) with a 1/8” Allen wrench if wobble occurs.

  2. Measure Overall Length (OAL):

    • Unfolded OAL must exceed 26 inches (ATF Requirement).

    • Example: AR-15 with 16” barrel = 32.5” OAL (compliant).

  3. Lubricate & Maintain:

    • Apply gun grease to the hinge pin and locking lug.

    • Inspect O-rings monthly; replace if cracked or worn.

Troubleshooting & Pro Tips

  • Stock Won’t Lock Open: Tighten hinge screw (Part 10) clockwise.

  • Buffer Rattles: Apply threadlocker to flange set screw (Part 7).

  • Legal FAQ: “Can I fold while firing?” → No! Always unfold before shooting.

Why Choose Vinkefox?

Unlike generic adapters, the Vinkefox Folding Stock Adapter:
✅ Exceeds 10,000-cycle durability (MIL-SPEC tested)
✅ Includes a lifetime warranty & compliance guarantee
✅ Saves 63% vs. competitors (Only $89 at vinkefox.com)

Ready to transform your rifle? Shop Now or watch our installation video below! 🔧

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