XM129 40mm Grenade Launcher Barrel Improvement Program
Final technical rept.
MAREMONT CORP SACO ME NEW ENGLAND DIV
Pagination or Media Count:
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.