Gas tubes, early-late
Top: early style
Bottom: later style
The early style was made of carbon steel & had a different 'bend" to it, they were used to approximately 1967 as far as I know. The later style replaced the early after that & was stainless steel w/a different bend. The top one above is on the 65-66 XM16E1, the bottom is on the 80's era M16A1 shown later in the album.
Bottom: later style
The early style was made of carbon steel & had a different 'bend" to it, they were used to approximately 1967 as far as I know. The later style replaced the early after that & was stainless steel w/a different bend. The top one above is on the 65-66 XM16E1, the bottom is on the 80's era M16A1 shown later in the album.
Other Sizes: Original