Shop › ADV TECH AR15 BUFFER TUBE PKGE (MIL) ADV TECH AR15 BUFFER TUBE PKGE (MIL) $63.99 ATI Outdoors Buffer Tube Kit, Mil-Spec, Spring, Buffer, Locking Ring & Nut, Black A.5.10.2240 Quantity: Add To Cart Added! ATI Outdoors Buffer Tube Kit, Mil-Spec, Spring, Buffer, Locking Ring & Nut, Black A.5.10.2240