Aiming Point Displacement from Firing a Rifle from the Open-Bolt Position
Abstract
The displacement of a gunner's point of aim when firing a rifle from both the open bolt and closed bolt position was measured in dry-fire and live- fire tests. Results of the dry-fire test showed a shift of the aiming point upwards and to the right for right-handed gunners and upwards and to the left for a left-handed gunner. Aiming error dispersions were substantially larger for open bolt versus closed bolt. These effects were more pronounced when firing from the standing position versus firing from the prone position. The time history of aiming error from trigger pull to cartridge firing was measured for the open bolt firings. Live-fire test results were inconclusive due to large round-to-round dispersions of the test weapon, an xm19 rifle.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1979
- Accession Number
- ADA068215
Entities
People
- Dominick J. Giordano
Organizations
- Human Engineering Laboratory