Eagle Arms EA-15 .300 AAC Blackout AR-15 Semi-Auto Rifle, 16 in Barrel, Free-Float KeyMod, FAB Defense Stock — Circa 1989–1994 Lower
This EA-15 pairs a circa 1989–1994 Eagle Arms lower receiver from the pre-ArmaLite era with a modern .300 AAC Blackout upper. It features a 16-inch barrel with a 1:7 twist, a free-float KeyMod aluminum handguard with a continuous top Picatinny rail, and a stainless multi-port muzzle brake. A FAB Defense adjustable stock with QD socket and rubberized buttpad rounds out a practical, custom-configured AR-15 platform.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: It shows some wear and use, but seems to function well.
What’s Included
- Eagle Arms EA-15 semi-automatic rifle chambered in .300 AAC Blackout (assembled from mixed-period components)
- FAB Defense adjustable/collapsible buttstock (installed)
- Free-float aluminum KeyMod handguard with continuous top Picatinny rail (installed)
- Stainless multi-port muzzle brake/compensator (installed)
- 1x 30-round Hexmag HX-AR Series 2 polymer magazine
The serialized lower receiver is an Eagle Arms EA-15 from the Coal Valley, Illinois period, estimated 1989–1994. It is marked "CAL. 5.56 MM," while the installed upper and barrel are .300 AAC Blackout, reflecting the rifle’s mixed-period custom assembly. The receivers are aluminum alloy with a matte black anodized finish.
The .300 AAC Blackout barrel is 16 inches with a 1:7 twist and is threaded, capped by a stainless multi-port muzzle brake/compensator. The free-float aluminum handguard uses the KeyMod interface at 3, 6, and 9 o’clock and carries a continuous top Picatinny rail with T-marked references on the flat-top upper. A short accessory rail section is positioned at the front 6 o’clock.
Furniture includes a FAB Defense adjustable/collapsible polymer stock with a QD sling socket and a rubberized buttpad, paired with an AR-pattern polymer pistol grip with checkering. The carbine-length receiver extension is secured with a castle nut, and length of pull is 13.25 inches. Controls include a manual safety.
The rifle uses a detachable STANAG-pattern magazine system with a 30+1 capacity. One Hexmag HX-AR Series 2 30-round polymer magazine is included. Country of origin is the United States.