Photo 56 of 68, Colt Model 603 (XM16E1, M16A1 Army)

This view shows some minor later parts variations, the front swivel is held on by a rivet instead of the earlier roll pin (app. 1970-1971), the front sight base is forged but is not smoothed any longer it retains it's forging flash & there is a drain hole added under the front sight post, the base is also marked w/a C & a bell, the earlier bases were unmarked, this rifle has the Chrome chamber & bore, marked C MP Chrome Bore on barrel, this marking started app 1974, earlier (app 69-74) Chrome bore barrels were mkd C MP B, earlier barrels w/only chrome chambers were marked C MP C, and a better view of the "closed" birdcage suppressor.

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M16A1 muzzle This view shows some minor later parts variations, the front swivel is held on by a rivet instead of the earlier roll pin (app. 1970-1971), the front sight base is forged but is not smoothed any longer it retains it's forging flash & there is a drain hole added under the front sight post, the base is also marked w/a C & a bell, the earlier bases were unmarked, this rifle has the Chrome chamber & bore, marked C MP Chrome Bore on barrel, this marking started app 1974, earlier (app 69-74) Chrome bore barrels were mkd C MP B, earlier barrels w/only chrome chambers were marked C MP C, and a better view of the "closed" birdcage suppressor.
Photo 56 of 68, A1 R Mzzl.jpg, 90KB, 1053x544, 1530 Hits Other Sizes: Original
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