Manufactured To Military Specifications For Long-Lasting Service
Stainless steel carbine buffer spring manufactured to MIL-S-1357 specification for replacement on rifles with M4-type receiver extension tube for collapsible carbine buttstock. Replace a fatigued spring, or use as part of the rifle-to-carbine stock conversion. Cold drawn to ASTM A313 standard for heat- and corrosion-resistance, and case hardened for improved resistance to surface wear.
AR-15, Issue:11, Page:030
Big Book Catalog, Issue:70, Page:030
SPECS: 631 stainless steel. Fits AR-15/M16 rifles chambered in .223/5.56mm with M4-type receiver extension for collapsible buttstock.