An FRT is a system, not just a trigger, and the two parts buyers most often overlook are the bolt carrier group and the buffer. Get those right, and the trigger can do its job. Get them wrong, and you will blame a trigger for a system problem.
For the AR-15 FRTs at Next Level Triggers, the manufacturer guidance on the product pages is clear: a full-auto-compatible bolt carrier group is required for proper function, and an H2 or H3 buffer, or an A5 buffer system, is recommended. For the HK MR3, the guidance is the opposite in one important way: keep the factory semi-auto bolt carrier and factory buffer and spring. Follow the guidance for your specific product, not a generic FRT rule from the internet.
What to Check Before You Buy
- Exact platform: AR-15, HK MP5/SP5, B&T APC, B&T SPC/GHM, or HK MR223/MR556 are not interchangeable for FRTs.
- Grip frame or lower type: SEF vs AMBI for MP5/SP5, APC vs SPC/GHM for B&T, mil-spec lower notes for AR-15.
- Bolt carrier and buffer: Follow the manufacturer guidance on the specific product page, not a generic rule.
- Shipping and law: Some states restrict or prohibit FRTs. Confirm current federal, state, and local rules before ordering.
- Function check: After any trigger install, do a full safety and function check before live fire, and get professional help if anything is unclear.
The Common Mistake to Avoid
The mistake is changing buffers, springs, and carriers all at once and then not knowing what fixed, or broke, the gun. Change one thing at a time, function-check after each change, and stop if anything feels wrong.
Legal and Safety Note
This post is general educational information, not legal advice. Forced reset triggers are regulated differently across jurisdictions and their status can change. Confirm current federal, state, and local laws before purchasing, check shipping restrictions on the product page, and follow the manufacturer’s instructions. Always treat every firearm as loaded, keep the muzzle in a safe direction, and keep your finger off the trigger until you are ready to shoot. If a trigger ever behaves unexpectedly, unload, stop shooting, and seek qualified help.
Frequently Asked Questions
Does an FRT fire more than one round per trigger pull?
According to Rare Breed Triggers, as stated on Next Level Triggers product pages, no. Each pull fires one round; the forced reset system mechanically resets the trigger after each shot and locks it until the bolt carrier returns to battery.
Will this FRT fit my gun?
Check the product page for your exact platform, lower, grip frame, bolt carrier, and buffer notes. If any detail is unclear, confirm with Next Level Triggers before ordering.
Can I install an FRT myself?
These are described as drop-in triggers with no gunsmithing, fitting, or machining required on their product pages, but if you are not confident at any step, stop and get professional help, and always function-check before live fire.
Shop This on Next Level Triggers
Links below were checked on Next Level Triggers on 24 October 2026. Prices can change, so check the product page for current price, fitment, and shipping restrictions.