About the Rare Breed FRT-RD3 SEF Forced Reset Trigger for HK MP5/SP5

Why This FRT-RD3 (SEF) Stands Out

Having handled hundreds of trigger systems during my time as an armorer, I can tell you most shooters don't realize how much a quality trigger affects performance until they've tried a proper military-spec unit like this FRT-RD3.

The Good and The Bad

Mil-spec construction - exactly what I'd specify for a duty weapon
Proper heat treatment prevents wear - seen these last through multiple armorer inspections
Drop-in installation - no gunsmithing required for most builds
German manufacturing - tighter tolerances than aftermarket clones
Includes all necessary components - no hunting for small parts

Common Questions

SEF refers to the German "Sicher, Einzelfeuer, Feuerstoß" (Safe, Semi, Full-auto) selector markings, indicating this trigger pack meets original equipment specifications.

This is a standard semi-auto trigger pack. Always comply with local laws and FEMA regulations regarding firearm modifications.

Compatibility depends on your specific clone's dimensions. Most HK-pattern firearms accept this pack, but check your receiver specs.

It's a straightforward drop-in replacement for most HK platforms - remove your old pack, install this one, and function test.

The SEF version has military-spec hardening and finishing, while TM (training mode) variants may use softer materials for dry-fire practice.

Expect a crisp 4.5-5.5 lb break typical of HK factory triggers - heavier than match units but built for reliability.

Discreet packaging
30-day returns

Browse more: Triggers | Full Shop

What you're getting here is the real deal - not a commercial-grade imitation. Last updated: May 2026

Shipping, returns and FFL transfer

• Parts and accessories ship to your door where state and local law allow.
• Shipping is $29.99 per order, free on orders over $999. Orders usually leave within 1–3 business days after payment clears.
• Unused items in original packaging can be returned within 30 days of delivery.

Full terms: shipping and FFL transfers · returns and refunds · FAQ · contact us.

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