9. Factory 26 parts changes.
Changes made in 1965.
-Barrel, long lug 1956 - part1965, short lug part1965 - 1980. no pin barrel.
-Bayonet, blade, 1956 - part1965, spike bayo part 1965-1980.
-Wood stock, for blade 1956 - part1965, spike bayo part1965 - 1978, spike with take down lever cut 1979-1980.
Changes made in 1967.
-Bayonet lug, lightening cut 1956 - part1967 and 1979 - 1980, no lightening cut part1967 - 1970.
-Gas tube, 1 piece 1956 - 1967, 2 pieces 1967 - 1980.
-Carrier, lightening cut 1956 -1967, no lightening cut 1967 - 1980.
-Main spring guide and locking cap, milled 1956 -1967, stamp 1967 - 1980.
Changes made in other years.
-Rear swivel, side1956 - part1966, bottom swivel part1966 -1980.
-Top handguard, wood 1956 - 1970, bakelite 1979 - 1980.
Note: At factory 26 information on 1971-1978 are not available at this time.