The LMT Defense Torque Wrench (brand part no. R-LTW) is an armorer-grade tool designed to bring castle nuts, barrel nuts, and other AR-platform hardware to correct torque specification. LMT Defense builds its rifles and parts to military-contract tolerances, and this wrench reflects that same attention to detail, giving home armorers and professionals alike a repeatable way to avoid over- or under-torquing critical fasteners. A dedicated torque limiter design breaks or signals at the preset value so you stop applying force at exactly the right point. It is a smart companion tool for anyone doing their own gunsmithing work on an AR-15 or AR-10 build.

Key Specifications

• The wrench uses a dedicated torque limiter mechanism to stop at a preset torque value.
• It is manufactured by LMT Defense, known for military and law-enforcement-contract AR-platform rifles.
• It is built for use on AR-platform castle nuts, barrel nuts, and similar threaded hardware.
• The UPC is 815415016702.
• Style is classified as Torque Limiter.

Frequently Asked Questions

Why does torque matter on an AR build?
Under-torquing can let parts loosen under recoil, while over-torquing can strip threads or crack components, so hitting the correct spec matters for reliability and safety.

Is this wrench specific to LMT rifles?
It is designed around standard AR-platform torque specs, so it works on most mil-spec AR-15 and AR-10 builds, not just LMT rifles.

Buy the LMT Defense Torque Wrench

The LMT Defense Torque Wrench ships as soon as it’s available from our Lubbock, Texas gun shop — check back or contact us for the next restock date.