Geissele Super Duty MOD 1 5.56 NATO 10.3"Bbl Black Short Barrel Rifle (NFA) 08-523B

Geissele Super Duty MOD 1 5.56 NATO 10.3" Black SBR 08-523B is the shortest configuration in the standard MOD1 SBR lineup — built for shooters who need maximum maneuverability in vehicles, structures, or tight quarters without giving up Super Duty reliability.

The barrel is cold hammer forged, chrome-lined, and cut to a 1:7 twist on Geissele's tapered profile, running a carbine-length gas system through a Super Compact Gas Block with a .070" gas port tuned specifically for this shorter length. This Geissele Super Duty 10.3 build channels that gas through a Nanoweapon®-coated Reliability Enhanced Bolt Carrier Group with a forged Stressproof Bolt, holding up to sustained round counts better than standard bolts — a real consideration on a barrel this short, where dwell time and pressure curves get less forgiving.

The Geissele MOD1 Super Duty platform's SSA-E X® trigger with Lightning Bow® splits the difference between a classic M4 trigger and a flat-bow design. A 9.3" MK16 rail with Geissele's Center Tab mating keeps the front end rigid despite the reduced length, and a B5 Systems Enhanced SOPMOD stock rides a mil-spec buffer tube with QD endplate for a solid, adjustable cheek weld.

Key Features:

• 10.3" cold hammer forged, chrome-lined barrel, 1:7 twist
• Carbine-length gas system, .070" gas port, Super Compact Gas Block
• Nanoweapon®-coated Reliability Enhanced BCG, forged Stressproof Bolt
• SSA-E X® trigger with Lightning Bow®
• 9.3" MK16 rail w/ Geissele Center Tab
• B5 Systems Enhanced SOPMOD stock
• Airborne Charging Handle (ACH®)
• Approx. 6.3 lbs, black finish

This Geissele Super Duty SBR hands shooters the shortest barrel in the standard MOD1 line, built for close-quarters roles where every inch of length costs maneuverability.