Up for auction is a vintage Colt SP1 M16A1-style upper receiver assembly featuring a 20-inch barrel, large front pivot pin ("big pin") configuration, and original triangle handguards. This upper represents the classic appearance and handling characteristics of the early AR-15 rifles that helped establish Colt's place in firearms history. The barrel retains a sharp, reflective bore.

This example captures the unmistakable profile of the original M16A1-pattern rifle with its lightweight 20-inch barrel and iconic triangular handguards. The large front pivot pin configuration is a hallmark of many early Colt civilian rifles and remains highly desirable among collectors and retro AR enthusiasts seeking authentic Colt components.

Included with the upper are an additional stock and pistol grip, providing valuable accessories for a retro restoration project or period-correct rifle build. The combination of genuine Colt manufacture, classic M16A1 styling, and included furniture makes this an especially attractive package for collectors and builders alike.

As interest in retro AR-15 rifles continues to grow, original Colt SP1 components have become increasingly difficult to locate. Whether you're completing a historically correct build, restoring a vintage Colt rifle, or adding to an advanced AR collection, this upper offers authenticity and collector appeal that modern reproductions simply cannot replicate.

THIS ITEM IS AS PICTURED WITH NO FURTHER ATTACHMENTS. ALL SALES ARE FINAL. PLEASE REFER TO THE AUCTION DESCRIPTION, LOT #1 DESCRIPTION AND TERMS OF SALE BEFORE BIDDING.     UNTIL FURTHER NOTICE, NO SALES TO COLORADO WILL BE ALLOWED     GOOD LUCK BIDDING, WE HOPE YOU FIND THE ITEM YOU ARE LOOKING FOR!

• Estimate - Range: 1500-1800