1911 Short Block – Officer Tactical – .45 ACP

The 1911 Short Block – Officer Tactical in .45 ACP gives builders and gunsmiths a faster, more efficient way to start a custom 1911. Whether you build for duty, defense, or range use, this kit saves time, reduces fitting work, and delivers proven quality from the very beginning.

Rather than starting with mismatched parts, each Short Block includes a matched slide, frame, and barrel. Furthermore, we fit these components using the same methods and tooling found in our full custom builds. As a result, you gain consistency, reliability, and accuracy—while keeping your project affordable and efficient.

Built for Serious Custom Builds

Our Short Blocks combine premium materials with precise fitting to create a dependable foundation for your next .45 ACP 1911 project. Because the critical components already work together, you can focus on tuning, finishing, and personalization instead of correcting basic fit issues. Consequently, you save valuable bench time and effort.

Precision Frame – Oriskany Arms

The Oriskany Arms 1911 frame delivers features typically found on frames costing two to three times more. At the same time, it provides the strength and durability required for the .45 ACP cartridge.

• Precision cast from 4140 carbon steel

• CNC machined to final dimensions

• Heat treated to Rc 22–24 for optimal durability

• Oversize frame rails allow an exceptionally tight slide-to-frame fit

• 20 LPI front strap checkering improves grip and recoil control

Because of this construction, the frame offers a strong, economical foundation for a reliable and accurate all-around shooter.

Elite Slide – Strength and Control

TMC Elite 1911 Slides begin as 4140 bar-stock carbon steel and then undergo precision CNC machining and heat treatment. As a result, they provide the strength needed to handle .45 ACP recoil while maintaining smooth operation.

• High strength and fatigue resistance

• Excellent toughness and impact resistance

• Front and rear serrations for positive grip

• Standard dovetail sight cuts

  • Rear: .495 x 65°

  • Front: .330 x 65°

Therefore, the slide racks smoothly and delivers consistent control shot after shot.

Match-Grade Barrel and Bushing

TMC match barrels are CNC machined in the USA from premium stainless steel bar stock. In addition, they feature slightly oversized dimensions to promote tighter lockup and improved accuracy.

• Heat treated and cryo stress-relieved

• Precision broach-cut rifling

• Excellent accuracy with all bullet types, including lead

Each Short Block also includes a hand-fitted barrel bushing, which ensures strong lockup and repeatable performance with .45 ACP loads.

Precision Fit Where It Matters Most

• Slide-to-Frame Fit: Held to extremely tight tolerances for smooth cycling and improved accuracy

• Barrel Fit: Hand-fitted bushing provides consistent lockup and reliable performance

Moreover, the kit includes the recoil system and slide stop, which further reduces build time and simplifies final assembly.

Parts Required to Complete the Build

To complete your Short Block, you will need the following components:

• 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 Short Block?

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

⚠️ FIREARM WARNING

1911 frames are serialized firearm components regulated by the BATFE.

• This item 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

• You must 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