1911 Short Block – Officer – Classic – .45 ACP

The 1911 Short Block – Officer – Classic – .45 ACP provides builders and gunsmiths with a fast, reliable starting point for a compact, traditional 1911. Whether you are a do-it-yourself shooter or a professional gunsmith, this kit saves time, reduces fitting work, and ensures consistent performance right out of the box.

Each 1911 Short Block includes a matched slide, frame, and barrel, carefully fitted using the same standards and methods as our full custom builds. As a result, you gain precision, consistency, and reliability while keeping your project efficient and fully customizable.

A Classic Foundation for Custom Builds

This Classic 1911 Short Block gives you a properly fitted core, so you can focus on finishing, tuning, and personal customization. Because the main components already work together, you avoid common fit issues and save hours of bench work, making your build faster and smoother.

Precision Frame – Oriskany Arms

The Oriskany Arms Officer frame combines traditional 1911 styling with modern manufacturing quality:

• Precision cast from 4140 carbon steel

• CNC machined to final dimensions

• Heat treated to Rc 22–24 for long-lasting durability

• Oversize frame rails for tight slide-to-frame fit

• Classic, clean lines for traditional builds

This frame provides a strong, reliable foundation for a compact .45 ACP 1911 that handles recoil confidently and shoots smoothly.

Classic Slide – Strength and Control

TMC Classic 1911 slides are crafted from 4140 bar-stock carbon steel and precision CNC machined for superior strength and durability.

• High resistance to wear and fatigue

• Traditional front and rear serrations for positive grip

• Standard dovetail sight cuts

  • Rear: .495 x 65°

  • Front: .330 x 65°

Because of this design, the slide cycles smoothly and provides consistent control, giving your compact 1911 both reliability and classic styling.

Match-Grade Barrel and Bushing

Each Short Block comes with a TMC match-grade stainless steel barrel, CNC machined in the USA:

• Slightly oversized for tighter lockup

• Heat treated and cryo stress-relieved for durability

• Precision broach-cut rifling for consistent accuracy

• Works with all .45 ACP bullet types

Additionally, the kit includes a hand-fitted barrel bushing for strong lockup and repeatable performance.

Precision Fit Where It Counts

• Slide-to-Frame Fit: Tight tolerances for smooth cycling and improved accuracy

• Barrel Fit: Hand-fitted bushing ensures solid lockup and reliable operation

The kit also includes the recoil system and slide stop, further reducing assembly time.

Parts Required to Complete the Build

To finish your Officer Classic Short Block, you will need:

• Plunger tube

• Mainspring housing and magazine release

• Hammer, sear, sear spring, and disconnector

• Trigger

• Thumb safety and grip safety

• Firing pin, firing pin spring, and firing pin stop

• Extractor and ejector

• Complete 1911 pin kit

Why Choose a TMC Classic Short Block?

Because this Short Block follows the same precise fitting standards as our full custom builds, it delivers accuracy, smooth operation, and long-term reliability. In short, it removes the most time-consuming part of a .45 ACP 1911 build while leaving complete freedom for customization.

⚠️ FIREARM WARNING

1911 frames are serialized firearm components regulated by the BATFE:

• Must ship to a Federal Firearms License (FFL) holder

• All BATFE, GCA, and NFA rules apply

• You are responsible for confirming legality in your state

• Ensure your chosen FFL will accept and transfer the firearm

Thunder Mountain Custom, LLC is not responsible for shipping or administrative fees if an FFL refuses delivery.