No. u003ca href=u0022https://www.tregaskiss.com/liners/u0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eJump linersu003c/au003e can be used with almost all neck / handle combinations EXCEPT for the T series and T series small straight handles when configured with a fixed neck. A free jump liner will also still be automatically provided with every gun configured with a rotatable neck and a conventional liner (guns ordered with QUICK LOAD liners will not include a free jump liner).