First built my M4gery in 1992 with all Bushmaster parts. Over the years have replaced with Colt's parts as they became available. At this point this M4gery is all Colt's circa 1995, the year the M4 Carbine was adopted Standard A (other then the Colt Defence M4 Carbine lower).
Far as I can tell regular production under contract started in 1994 with the first 2,000 delivered with the M16A2 type upper receiver. In 1995 the US Army standardized the flat top upper receiver, and specified it's use in all M4 Carbines. In these early years after the adoption of the M4 small deliveries were made to each Infantry Division, with the priority going to SOF type units.
Over the years I had added a Knight's RAS, and a Aimpoint CompM/XD. Recently built a M4A1 clone (details here):
ar15.com/forums/topic.html?b=3&f=118&t=229465So I went ahead and sold the RAS and Aimpoint and returned the older M4gery back to what it was, basically stock as delivered. Here are some pics and details:
Mid 90's Colt's had a dark matte gray anodizing, and small steel parts were mostly done up in a dark gray parkerzing. Along with darker furniture the rifles were better matching in color then later Colt's.
Early carry handle with "circle A1" forge code.
Early M4's were stamped either M4 or 4 above the gas tube hole in the receiver. This one is simply marked 4.
Early front swivel was two side, one side for skinny profile, the other for larger diameter.
Early M4 handguards were a much darker black then current ones. Heat shields were not glued in at the time.
1995 production M4 Carbines bolts were marked MPC with the C below the MP. A standard blue extractor buffer and spring were used. Later M4 Carbines used a standard spring with black buffer, and current production is black buffer with gold spring.
Close up of barrel markings, and muzzle attachments. On this project I used a standard flash hider, Smith jam nut, A1 washer, and peel washers to get past 16", and silver soldered on.
N stamp common on Colt's buttstock of this type.