Wilson Combat - TTU Installation

Published on July 20, 2010
Duration: 5:51

This guide details the expert-level installation of the Wilson Combat TTU (Tactical Trigger Unit) for AR-15 platforms. It covers essential safety protocols, step-by-step disassembly of the standard trigger group, and precise installation procedures for both single-stage and two-stage TTU variants. The instruction emphasizes critical functional checks to ensure safe and reliable operation post-installation, highlighting the self-contained nature of the TTU.

Quick Summary

Install the Wilson Combat TTU by first clearing the firearm and separating receivers. Remove old trigger parts, then carefully insert the self-contained TTU into the lower receiver, aligning and seating the pins. Perform a critical function check to ensure safe operation before reassembling.

Chapters

  1. 00:00Introduction to TTU Installation
  2. 00:05Safety and Disassembly Prep
  3. 00:18Removing Upper Receiver
  4. 00:30Preparing for Trigger Removal
  5. 00:53Removing Hammer and Trigger Pins
  6. 01:42Examining the Wilson Combat TTU
  7. 02:36Installing Single-Stage TTU
  8. 03:15Installing TTU Pins
  9. 03:59Installing Two-Stage TTU Variation
  10. 04:51Function Check
  11. 05:25Final Assembly

Frequently Asked Questions

What are the key steps for installing a Wilson Combat TTU?

Begin by ensuring the firearm is unloaded. Disassemble the upper and lower receivers, then remove the standard trigger components. Install the self-contained TTU by carefully aligning it and inserting the pins. Finally, perform a thorough function check and reassemble the firearm.

How do you prepare the AR-15 lower receiver for trigger removal?

After clearing the firearm and separating the receivers, place the lower receiver in the 'fire' position. Gently release the hammer to relieve tension on the hammer spring, making the removal of the hammer pin safer and easier.

What is the difference in installation between a single-stage and two-stage TTU?

The primary difference is the hammer's state during installation. For a single-stage TTU, the hammer should be cocked. For a two-stage TTU, the hammer must be released (open position) before housing it in the receiver, then cocked afterward.

Why is a function check critical after installing a new trigger like the TTU?

A function check verifies that the trigger mechanism operates correctly and safely. It ensures the hammer releases properly, the disconnector engages and releases as intended, and the safety selector functions reliably, preventing accidental discharges.

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