3DP Tactical Solutions MAC-10/MAC-11 FRT (316 Stainless)

3DP Tactical Solutions machines this forced reset trigger from 316 stainless, and it lists Cobray variants alongside the MasterPiece Arms Defender line. That matters, because most MAC FRTs are cut for the Defender alone, and Advanced Reset Technology's 3-position system explicitly excludes Cobray-pattern guns. If your host is an M11/9 rather than an MPA30T, this is one of two steel options; the other, ART's MAC-11/VMAC9/MPA 2-Position System, is maker-tested on Cobray hosts but requires a clearance cut in the upper receiver and removal of the denial bar.

The trade is that 3DP sells it as a limited beta batch for R&D. All sales are final, and the vendor states plainly that it is not a drop-in part and that it cannot guarantee function on every host. Expect to fit, tune, and possibly file. MAC-pattern receivers span decades of manufacturers and tolerances, so that caveat is honest rather than evasive.

3DP also publishes a MAC FRT troubleshooting page explaining that most reset failures come from bolt speed and cycling energy rather than the trigger itself. Read it before you buy. At $150, marked down from $225, it undercuts the steel Twitch variants while covering more hosts than any of them.