Geissele Automatics Super Duty HBAR AR-15 Barreled Upper Receiver 5.56 Midlength – Black – No Muzzle Device – 14.5″
The Geissele Super Duty HBAR Barreled Upper Receiver is built for shooters who want a hard-use 5.56 upper with premium materials and a strong foundation for a custom setup. This stripped configuration pairs a 14.5-inch cold-hammer-forged, chrome-lined heavy barrel with a 13.5-inch MK16 Super Modular rail, giving you a durable, accurate platform ready for your preferred bolt carrier group, charging handle, and muzzle device. The center-aligning rail tab helps prevent rotation, while the tuned mid-length gas system and Super Compact Gas Block are designed to support smooth, reliable operation in demanding conditions.
Features
- Stripped upper configuration ready for your preferred finishing components
- 14.5-inch Geissele heavy profile barrel
- Cold hammer forged, chrome-lined barrel construction
- 13.5-inch MK16 Super Modular rail with Geissele center tab
- Mid-length gas system with tuned gas port sizing
- Super Compact Gas Block
- Black finish
- Made with Geissele’s in-house barrel manufacturing and machining
Specifications
- Caliber: 5.56mm
- Barrel Length: 14.5 in.
- Barrel Twist Rate: 1:7
- Barrel Profile: Heavy
- Gas Length: Mid-Length
- Gas Port Size: .076 in.
- Rail Length: 13.5 in.
- Receiver: Super Duty Upper
- Weight: Approx. 3.8 lbs.
- Muzzle Device: None
- Color: Black






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