This document provides detailed blueprint dimensions and assembly notes for constructing a home-built AK-47 receiver. It includes specific measurements for the upper and lower rails, trigger guard, and side plates.
The guide specifies fabrication methods using 0.5-inch thick 4130 sheet steel or rectangular 4130 tubing. It details necessary heat treating procedures, including quenching in mineral oil or water to achieve a Rockwell C60 hardness, followed by tempering to blue-hot temperatures to reduce brittleness.
| Material Thickness (Sheet) | 0.5 inch |
|---|---|
| Lower Rail Location Width | 2.450 to 2.525 inches |
Side plates can be fabricated from 0.5 inch thick 4130 sheet or rectangular 4130 tubing.
The metal must be heated red hot with a MAPP torch, quenched immediately in mineral oil or water, and then tempered to blue hot.