Anderson Lower Receiver Physical

Published on July 19, 2020
Duration: 14:01

This video provides a detailed physical inspection of an Anderson AM-15 lower receiver, focusing on critical dimensions and functional checks. It covers testing the fire control group, trigger pull weight, magazine catch, takedown pins, buffer tube staking, and magazine well fit. The inspection uses specialized gauges and tools to assess manufacturing tolerances and potential issues like receiver lug gaps and internal milling evenness, offering insights into build quality.

Quick Summary

The Anderson AM-15 lower receiver's trigger pull weight was measured at 8 pounds, standard for a mil-spec fire control group. Critical inspections include fire control group function, magazine catch, pin hole sizing, buffer tube staking, and internal milling evenness for optimal AR-15 build quality.

Chapters

  1. 00:00Introduction to Anderson AM-15 Lower Receiver
  2. 00:40Fire Control Group & Safety Testing
  3. 01:30Measuring Trigger Pull Weight
  4. 02:52Magazine Catch Inspection & Adjustment
  5. 04:06Takedown & Pivot Pin Gauging
  6. 04:39Buffer Tube & Castle Nut Staking Check
  7. 05:33Magazine Well Fitment Gauge Test
  8. 06:07Upper Receiver Lug Fitment Check
  9. 07:21Safety Selector Hole Gauging
  10. 07:55Internal Milling & Receiver Wall Inspection
  11. 09:03Pin Hole & Spring Inspection
  12. 10:15Gas Key Clearance Check

Frequently Asked Questions

What is the typical trigger pull weight for an Anderson AM-15 lower receiver?

The trigger pull weight measured on this Anderson AM-15 lower receiver was 8 pounds. This is considered a standard pull weight for a mil-spec fire control group, indicating typical performance for this component.

How is the magazine well fitment tested on an AR-15 lower receiver?

Magazine well fitment is tested using a USGI magazine well gauge. This tool checks if the internal dimensions are within tolerance, ensuring reliable insertion and release of standard AR-15 magazines.

What are critical areas to inspect on an AR-15 lower receiver for build quality?

Critical areas include the fire control group function, trigger pull weight, magazine catch operation, takedown/pivot pin hole sizing, buffer tube staking, magazine well dimensions, and internal milling evenness for smooth BCG operation.

Why is checking upper receiver lug fit important on an AR-15 lower?

Checking the gaps where the upper receiver lugs sit on the lower receiver is important to ensure the upper won't have excessive play or 'flop' when assembled. Proper fitment contributes to a more stable and accurate rifle.

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