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Accu-Lock

1911 Reverse Plugs - Gm Collar Plug

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Eared Band

Design fills the holes around

Oversized Band

Allows precise fitting to the

Flange Plug

Retrofits existing slides with cone-style

Collar Plug

Fits STI/SVI slides

Steel, In-the-white

Construction

$39.99
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SKU: 448191100

Overview

Designed for 1911 owners fitting a bull barrel or cone bushing, this reverse plug helps close off the open area around the barrel while providing a more tailored slide fit. The eared band design is intended to cover the unsightly gaps that can remain after the conversion, and the oversized band allows precise fitting for added barrel support. It is also described as a retrofit option for existing slides with cone-style bushings, with the collar plug sized for STI/SVI slides. The GM version is steel, in-the-white, and measures 1.7 inches long with a .50-inch diameter.

Why Hunters Choose the Accu-Lock

Eared Band

Design helps fill the open

Oversized Band

Allows precise fitting to the

Designed Increase

Barrel support

Retrofits Existing

Slides with cone-style bushings

Collar Plug

Fits STI and SVI slides

Key Features

  • Eared band design fills the holes around the barrel area when fitting a bull barrel or cone bushing.
  • Oversized band allows precise fitting to the slide for increased barrel support.
  • Flange plug retrofits existing slides with cone-style bushings.
  • Collar plug fits STI/SVI slides.
  • Steel, in-the-white construction.
  • Measures 1.7 inches long and 0.50 inches in diameter.

Best Used For

  • 1911 owners fitting a bull barrel who need to cover the open barrel area cleanly
  • Shooters using cone-style bushings on existing slides and wanting a retrofitted plug solution
  • STI or SVI slide owners needing a collar plug matched to that platform
  • Users seeking a precise-fit reverse plug with an oversized band for slide fitting
  • Builders who want added barrel support without changing the pistol’s overall appearance

Pros

  • Eared band design helps fill the open area around the barrel.
  • Oversized band allows precise fitting to the slide.
  • Designed to increase barrel support.
  • Retrofits existing slides with cone-style bushings.
  • Collar plug fits STI and SVI slides.
  • Steel construction, supplied in-the-white.

Considerations & Trade-offs

  • Designed for bull barrel or cone bushing setups, so it is not a general-purpose plug for every 1911 configuration.
  • The oversized band is intended for precise fitting, which may require careful fitting work rather than a simple drop-in install.
  • Steel, in-the-white finish means the part is unfinished and may need final finishing to match the build.
  • The product is specific to STI/SVI slides, so compatibility should be verified before purchase.

Suggested Comparisons

  • 1911 pistol barrel plugs
  • 1911 slide fitting parts
  • 1911 barrel support accessories
  • 1911 pistol gunsmithing components

Suggested Accessories

  • Gun cleaning kit
  • Pistol sight tool
  • Replacement recoil spring
  • Bench vise

Frequently Asked Questions

What is this reverse plug used for on a 1911-style pistol?

It is designed to fill the open area around the barrel when fitting a bull barrel or cone bushing, and to provide a reverse plug option for compatible 1911 setups.

Which slides does the collar plug fit?

The product description states that the collar plug fits STI/SVI slides.

Can this plug be used to retrofit an existing slide?

Yes. The description says the flange plug retrofits existing slides with cone-style bushings. The collar plug is listed separately for STI/SVI slides.

What material and finish are listed for this part?

The specifications list it as steel, in-the-white.

What are the listed dimensions?

The provided specs list the GM version at 1.7 inches (43.2 mm) long and 0.50 inches (12.7 mm) in diameter.