The Gun Digest Book of the AR-15, Volume 4 (Gun Digest Book of the Ar 15)
| Country | USA |
| Brand | AUTO METER |
| Manufacturer | Auto Meter |
| Binding | Automotive |
| ItemPartNumber | 1421 |
| Model | 1421 |
| Warranty | Warranty |
| Color | Chrome Bezel |
| ReleaseDate | 2013-09-27 |
| Size | Stock |
| UnitCount | 1 |
| UPCs | 046074014215 |
| EANs | 0046074014215 |