JP Enterprises Hex Jam Nut 5/8-24, Black

CMMG Barrel Nut, Black - Essential Component for Secure Barrel Installation and Reliable Performance - 55DA244

EGW 2-Pack M-LOK Nut w/(2) #10-24 x 3/8" Flat Head Screws, Stainless

Sons of Liberty Gun Works Barrel Nut

Ergo Castle Nut for AR-15, Black - 4971-(B)

JP Enterprises Enhanced Carbine Buttstock Castle Nut, Black

JK Armament 155HD Thread Mount 1/2-28, Armor Black - Secure, Reliable Mounting - JK-155-HDM28