Tippmann M4 MK18 -/1 by Published: 30th January 2020 (12 months ago) £400.00 Category Assault Rifles & SMGs Location Diss Condition Used - Cosmetic Wear But Operational Delivery Options Collection Tippmann m4 HPA mk18 conversion. TTR TDC TTR Pistol GRIP Orga Inner barrel Custom rail. Fixed double feeding and twang.