Adcor Defense A-556 AR-15 Pattern 5.56 NATO Short-Stroke Piston Rifle 16" Matte Black
The Adcor Defense A-556 is a U.S.-made AR-15 pattern semi-auto rifle chambered in 5.56mm NATO, built around a short-stroke gas piston operating system. This example features a 16" barrel with a 1:7 twist, a flat-top layout with a continuous Picatinny-railed handguard/upper, and folding iron sights. It is marked Adcor Defense Inc, Baltimore, MD, and "CAL. MULTI" on the receiver set.
CONDITION
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are some minor, superficial scratches and small blemishes present. The bore is clean and shiny.
WHAT’S INCLUDED
- Original box
- 5x 30-round magazines
- 2x 10-round magazines
This A-556 is configured with a continuous Picatinny top rail and rail positions that are indexed/numbered along the top, left, and right sides. The rifle includes folding front and rear iron sights and a matte black finish.
The action is a short-stroke gas piston design, and the rifle follows an AR-15 pattern layout with a STANAG-pattern detachable box magazine interface. The receiver markings include "ADCOR / DEFENSE INC / BALTIMORE, MD" and "CAL. MULTI," along with "5.56 NATO 1/7."
Furniture includes a collapsible polymer stock and a Magpul pistol grip. Up front, the muzzle device appears to be an A2-style "birdcage" flash hider.
The sale includes seven magazines total, noted as Magpul PMAG AR/M4 Gen M2 polymer magazines, with photos showing a mix of full-length and short-length PMAGs, including some still sealed in Magpul retail packaging.