FM-PRODUCTS FM-45 LOWER BUFFER TB/CASTLE NUT/END PLT/SAFE-T-FIRST TRIG/SELECT/GRIP/BRACE NO ADAPTER

Tacfire Buffer Tube Castle Nut for AR-15 - Black, Essential for Assembly - MAR039

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

JP Enterprises Enhanced Carbine Buttstock Castle Nut, Black

TacFire 6-Postion Mil-Spec Buffer Tube Kit w/Dual Loop End Plate, Black

GUNTEC AR15 PISTOL BUFFER TUBE KIT ANODIZED BLACK

Tacfire Buffer Retainer Pin & Spring 10/ct

JP Enterprises Enhanced Carbine Buttstock Lock Plate w/QD Attachment, Black