Smart-Fit Vise Block for Double-Stack Magwell Pistols (9mm/.357/.40)
This expandable vise block creates a rock-solid, hands-free working platform by locking into the pistol’s magwell with an internal expanding mechanism. Instead of the sloppy wobble you get from traditional “one-size” blocks, this design uses an adjustment knob to expand for a tight internal fit—so the firearm stays stable while you work.
What it’s for / why it matters: Stable clamping means safer, cleaner work. Whether you’re cleaning, inspecting, swapping small parts, or doing detailed bench tasks, a secure hold reduces slips, scratches, and frustration. It’s built around Glock-pattern double-stack magwells and is also useful for Glock-mag-fed AR9/PCC platforms that share the same magwell geometry.
What’s included:
- Expandable magwell vise block with adjustment knob (for a custom, tight fit)
- Knurled outer gripping surfaces to hold securely in vise jaws
- Magazine lock relief groove for smooth insertion/removal
- AR9 Pivot Lock accessory (helps hold an AR9/PCC upper open for easier chamber/barrel access when applicable)
Key features & specs:
- Expandable fit: adjustment knob expands the block inside the magwell to eliminate wobble
- Stable clamping: designed to clamp securely in standard bench vise jaws
- Grip: knurled exterior improves bite and stability in the vise
- Designed for: Glock-pattern double-stack magwells in 9mm, .357 SIG, and .40 S&W
Fitment
- Fits Glock-pattern double-stack magwells chambered in 9mm, .357 SIG, and .40 S&W.
- Also works with many Glock-mag-fed AR9/PCC platforms that use Glock-style double-stack magwells.
Does NOT fit
- Single-stack Glock-pattern magwells (example: slimline/single-stack families).
- Large-frame Glock-pattern magwells in 10mm/.45 (different geometry).
- Non–Glock-pattern magwells or platforms that do not use Glock-style double-stack magazines.
Tools needed
- Bench vise (standard jaws).
Install notes
- Unload the firearm completely and remove the magazine before installing the block.
- Insert the block into the magwell, then turn the adjustment knob until snug—tight enough to remove play, not so tight you’re forcing it.
- Clamp the block (not the firearm) in the vise. This keeps pressure controlled and prevents finish damage.
- When removing, back off the knob before pulling the block out to avoid unnecessary friction.
Verify to prevent returns: Verify compatibility before you purchase.
⚠ Glock Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by Glock, Inc. or Glock Ges.m.b.H.
All references to GLOCK® are used solely to identify firearm models, parts compatibility, and fitment information for customers. Glock is a federally registered trademark of Glock, Inc. and Glock Ges.m.b.H.
Any product sold on this site referencing Glock is aftermarket, not OEM, and is not manufactured by Glock. Glock does not warranty, authorize, or guarantee the performance, safety, or reliability of any third-party components or modifications.
Firearm parts should be installed by a qualified armorer or gunsmith. Improper installation, modification, or use of aftermarket components may affect firearm safety, reliability, and void manufacturer warranties. By purchasing and installing third-party parts, the buyer assumes all responsibility for safe handling, installation, function testing, and use of their firearm and accessories.
