URSA-SEC MP Defender FRT

URSA-SEC is the only MAC FRT vendor that lets you buy the same part in five materials. The MP Defender FRT is offered in PLA, ABS, Nylon, aluminum, or steel, from $59.99 to $129.99, so you can start with a cheap printed unit to prove fitment and reorder in steel once the gun cycles. Every unit is made to order on a 2 to 3 week lead and function-checked before it ships.

The support terms are the strongest in this category. URSA guarantees lifetime support and replaces parts that wear or break during operation, with no questions asked. Compare that to 3DP, which sells its beta units final-sale with no refunds, or 144.1, which will not take back an installed trigger. On a class of product where breakage is expected, a no-questions replacement policy is worth real money.

Fitment covers the MPA30T, MPA930, and similar MAC-10 and MAC-11 pattern guns. URSA notes that MAC-pattern tolerances vary between makes and models and that minor fitting may be required, which is true of every product in this category.