This is a very rare and seldom encountered, original Colt manufactured M203 40mm Grenade Launcher. This specific model was originally designed in the late 1960s/early 1970s and was specifically intended to replace the standard M79 single barrel grenade launcher that was used throughout Vietnam. These were attached directly to the barrel of the M16A1 rifle and used a specially designed square handguard, along with a side mounted folding grenade launcher sight. It was intended to provide a single weapon system that was capable of both fully automatic rifle fire along with a grenade launcher capability all in one weapon. As noted, they used a folding sight that was mounted to the carrying handle which could provide aimed, effective fire for up to 400 meters. It proved to be a very effective weapon that has been in use by the U.S. Military (Army, Navy USMC, and AF) for the last 45 plus years. The left side of the receiver is marked: "COLTS MFG./HARTFORD/CONN U.S.A." and below that: "LAUNCHER, GRENADE/40 MM : M203/ S/N A204101/USA". This lot include the grenade launcher unit itself without the noted M16 square handguard or the grenade launcher sight.

Excellent with 98% of its original anodized finish overall. The round ribbed barrel cover is also in excellent condition . The markings are clear and sharp, and it looks like it has been test fired only. NOTE: This Destructive Device is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.