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XM129 40mm Grenade Launcher Barrel Improvement Program.

AD775478

Publication Date	1974
Page Count	37
Abstract	Various materials, coatings and mechanical changes to improve barrel life were previously tested and evaluated. It was concluded by that effort that one of the materials tested, H-11 tool steel, showed promise of significantly extending the average service life of the XM129 40mm barrel and it was recommended that additional testing be accomplished. The objective of the scope of work was to fabricate one hard chrome plated H-11 alloy barrel and test fire it a total of 15,000 rounds or until the barrel was declared unserviceable. In addition, test firing of barrel no. H-1 of H-11 material from the previous contract would continue until 15,000 rounds or it became unserviceable. The test firing was to be conducted in accordance with the schedule approved for the first contract. This work has been completed, the barrels have been sectioned and examined and the findings are presented in the report.
Keywords	Grenade launchers Gun barrels Rifling Wear Erosion Firing tests(Ordnance) Life tests M-129 grenade launchers(40-MM) XM-129 grenade launchers(40-MM) Steel H-11 Steel 4340
Source Agency	Invalid Source Agency Code
NTIS Subject Category	79G - Guns
Corporate Authors	Maremont Corp Saco Maine New England Div
Document Type	Technical Report
Title Note	Final technical rept.
NTIS Issue Number	197409
Contract Number	DAAF03-73-C-0140

XM129 40mm Grenade Launcher Barrel Improvement Program.

XM129 40mm Grenade Launcher Barrel Improvement Program.
AD775478

Publication Date	1974
Page Count	37
Abstract	Various materials, coatings and mechanical changes to improve barrel life were previously tested and evaluated. It was concluded by that effort that one of the materials tested, H-11 tool steel, showed promise of significantly extending the average service life of the XM129 40mm barrel and it was recommended that additional testing be accomplished. The objective of the scope of work was to fabricate one hard chrome plated H-11 alloy barrel and test fire it a total of 15,000 rounds or until the barrel was declared unserviceable. In addition, test firing of barrel no. H-1 of H-11 material from the previous contract would continue until 15,000 rounds or it became unserviceable. The test firing was to be conducted in accordance with the schedule approved for the first contract. This work has been completed, the barrels have been sectioned and examined and the findings are presented in the report.
Keywords	Grenade launchers Gun barrels Rifling Wear Erosion Firing tests(Ordnance) Life tests M-129 grenade launchers(40-MM) XM-129 grenade launchers(40-MM) Steel H-11 Steel 4340
Source Agency	Invalid Source Agency Code
NTIS Subject Category	79G - Guns
Corporate Authors	Maremont Corp Saco Maine New England Div
Document Type	Technical Report
Title Note	Final technical rept.
NTIS Issue Number	197409
Contract Number	DAAF03-73-C-0140