The Geissele Super HBAR MOD1 16″ Complete Upper Receiver in Distressed Diamond Cut is a heavy-barrel assembly designed for precision, durability, and heat capacity in 5.56×45mm NATO builds. Its robust .812″ gas journal cold hammer forged, chrome-lined barrel with a 1:7 twist is optimized for stability and long-range consistency, while the mid-length gas system and Super Compact gas block help ensure smooth cycling. The free-float MK16 M-LOK rail and full Picatinny upper provide a rigid platform for optics and accessories. Finished in DDC and ready for your choice of BCG and charging handle, the 08-617S is ideal for custom rifles where accuracy and sustained performance matter. Geissele Automatics Geissele Super HBAR MOD1 5.56mm 16″ Bbl (.812 Journal, 5/8×24) DDC Complete Upper Receiver 08-617S
Geissele Automatics Geissele Super Duty 5.56mm 16" Heavy Bbl (.750 Journal) Black Stripped Upper Receiver (No Charging Handle, Muzzle Device, or BCG)
Original price was: $1,025.00.$899.99Current price is: $899.99. 
DEMO Daniel Defense MK18 Black 5.56 NATO 10.3" Short Bbl Upper Receiver Group 23-004-08013-006 - Excellent Condition USED9762
Original price was: $1,517.00.$1,100.00Current price is: $1,100.00.
Geissele Automatics Geissele Super HBAR MOD1 5.56mm 16″ Bbl (.812 Journal, 5/8×24) DDC Complete Upper Receiver 08-617S
Original price was: $1,450.00.$1,269.99Current price is: $1,269.99.
Additional information
| Brand | Geissele Automatics |
|---|---|
| Merchant | EuroOptic |
