Geissele 11.5-inch MK16 Pistol on a Griffin MK2 Lower with Rhino S

An FDE 11.5-inch braced pistol pairing a Geissele CHF barrel and 10.5-inch MK16 rail with an Aero upper on a Griffin MK2 ambidextrous lower. A Ridgeback Rhino S mounts over a Comstock compact brake on a Wolfpack low-profile adapter, which the builder says keeps gas manageable. Inside it runs a Kynshot hydraulic buffer with a Tubb flatwire spring, and it wears a Holosun 503CU on a Kastle mount, a Geissele SSA-E X and Driven Arms grip and magwell.