Items Available For Purchase Today Object reference not set to an instance of an object. See All Vietnam Era 603M16A1 24 inch Martin Marietta For Sale from: gunner2013 | No feedback Yet View | Verified Seller | 1 Completed Sales View Sellers Items Vietnam Era 603M16A1 24 inch Martin Marietta For Sale from: gunner2013 | No feedback Yet View | Verified Seller | 1 Completed Sales View Sellers Items gunner2013 Seller Since: Feb. 2013 Identity Verified ( Lake Mary, FL ) This seller is NOT an FFL City: Lake Mary State: FL SOLD - $800.00 Shipping: $35.00 Accepted Payment Methods: Returns: No Returns Description: Late 60's Very Early 70's A1 24 inch heavy Martin Marietta replacement M16 upper for the M16A1. Complete with Colt Bolt Group.Will fit most lowers but needs a NDS16A1 lower type to match 100%.Fits Small hole .250 lowers .Colt Barrel -Martin upper- all original-Space Systems Divison Replacement.Nice Black production finish. This was when they went to the black anodizing. Get it now if you want the real deal.I am the second owner and Its only been fired maybe 20 rounds. I cleaned off the cosmoline and fired a 20 rounder through it. Its accurate as heck for a military machinegun upper. Shipped to your Door by USPS Insured. Condition: Used, As New Caliber: .223 Remington (5.56 NATO) Item #: 983862561 Location: FL Trades Accepted: Share: Shipping Notes: See Description Items You've Viewed Recently Vietnam Era 603M16A1 24 inch Martin Mari... $800.00 SELLER: gunner2013 Add To Cart