Gunsmithing the AR-15, The Bench Manual by Sweeney Patrick;

Author:Sweeney, Patrick;
Language: eng
Format: epub
Publisher: F+W Media

One way to assemble the lower is to simply shove the hammer in last so the geometry of the assembly holds it in place. This gets it close enough, but still not perfectly aligned.

The trigger with the disconnector properly installed.

Why did the military, and Armalite in the 1950s, feel the design they had was better? I don’t know, but while some feel it is better, or worse, and both camps disagree over this, it is what it is. And the AR trigger is good enough to do what you need. In the modern era, there are also companies who have taken the design, refined the geometry and then surface-treated the parts. A precision-ground AR mil-spec designed trigger, given a high tech low-friction coating, can be surprisingly good — more durable than some two-stage triggers. But, we’ll cover the two-stage triggers in more detail when we get there.

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