GEISSELE, UPPER RECEIVER GROUP, IMPROVED (COMPLETE) NEAR CLONE, 11.5″, 5.56MM, GEISSELE CHFBARREL, ACH DDC, MK16 DDC, SF4P, REBCG

Geissele Super Duty MOD1 Complete Upper, 11.5″, 5.56, black

The Super Duty® MOD1 is the current evolution of the Super Duty platform, incorporating continuous design development to provide superior ergonomics and modularity while maintaining the legendary balance of performance and reliability. Foundational to the renowned quality and performance of this Super Duty system is the in-house produced Cold Hammer Forged, chrome-lined barrel and Nanoweapon-coated Reliability Enhanced Bolt Carrier Group. Both the Geissele CHF barrel and Forged Stressproof Bolt are High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI), and work in concert to achieve unmatched dependability with match-grade accuracy. The Super Duty features a precisely balanced gas system, including the bomb-proofed Super Gas Block and fine-tuned gas port sizing.