The Rare Breed Triggers FRT-15. FRT = Forced Reset Trigger. Or to get right to the point, a "bump stock" trigger. 
www.rarebreedtriggers.com
Discussion at Snipers Hide.
Discussion at ar-15.com
www.ar15.com
Discussion at TTAG.
www.thetruthaboutguns.com
A spiffy video by the distributor.
Just like the infamous and now banned "bump stocks", the FRT-15 works on basically the same principle. Pull the trigger and hold it back, the gun fires one round, the BCG moves rearward causing the hammer to reset the trigger, the "locking bar" (which looks an awful lot like an auto sear) locks the trigger, the BCG comes forward which disengages the "locking bar" allowing the cycle to continue. The operative part of that sequence is that the trigger is reset and must be pulled again for the next round to fire. It's a semi-auto trigger. You can fire a single shot or you can fire a whole bunch of single shots very rapidly.
This isn't a binary trigger. It fires a round only on the trigger pull, not on the pull and then on the release.
It's not a full auto trigger since the trigger is reset and must be pulled for each successive shot. Therefore, it doesn't meet the definition of "machine gun" per 26 USC 5845(b) 2018 US Code :: Title 26 - Internal Revenue Code :: Subtitle E - Alcohol, Tobacco, and Certain Other Excise Taxes :: Chapter 53 - Machine Guns, Destructive Devices, and Certain Other Firearms :: Subchapter B - General Provisions and Exemptions :: Part I - General Provisions :: Sec. 5845 - Definitions
Read the discussions if you have the time. An apparent flaw was discovered and some folks on ar-15.com and Snipers Hide have come up with a fix.
Yeah, we all know the "bump stock" has been deemed a "machine gun" and therefore illegal by the ATF. We also know that's bullshit because technically it doesn't meet the legal definition. Will the FRT-15 trigger meet the same end? Who knows but this is still America and the 2nd Amendment is still law of the land as is 26 USC 5845(b) even though the ATF has illegally changed its meaning.
Would I buy one of these? Damn right I would. But first I'd like to see the company make these 100% functional. That little spring can turn these into expensive paperweights.
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Discussion at Snipers Hide.
Discussion at ar-15.com
Rare Breed Triggers FRT - Convince me to not buy one? > AR Discussions > AR15.COM
https://vimeo.com/486478480I don't want my dogs shot but this does look funSomebody PLEASE convince me to not buy one.


New: The Rare Breed Triggers FRT-15 Forced Reset AR-15 Trigger - The Truth About Guns
The new Rare Breed Triggers FRT-15 trigger for the AR platform allows very rapid semi-automatic fire from an AR-15 rifle. Watch the video above, which shows the trigger in action and explains how it works. The TL;DR is that the FRT-15’s sear forces the trigger to reset with every shot even if...

Just like the infamous and now banned "bump stocks", the FRT-15 works on basically the same principle. Pull the trigger and hold it back, the gun fires one round, the BCG moves rearward causing the hammer to reset the trigger, the "locking bar" (which looks an awful lot like an auto sear) locks the trigger, the BCG comes forward which disengages the "locking bar" allowing the cycle to continue. The operative part of that sequence is that the trigger is reset and must be pulled again for the next round to fire. It's a semi-auto trigger. You can fire a single shot or you can fire a whole bunch of single shots very rapidly.
This isn't a binary trigger. It fires a round only on the trigger pull, not on the pull and then on the release.
It's not a full auto trigger since the trigger is reset and must be pulled for each successive shot. Therefore, it doesn't meet the definition of "machine gun" per 26 USC 5845(b) 2018 US Code :: Title 26 - Internal Revenue Code :: Subtitle E - Alcohol, Tobacco, and Certain Other Excise Taxes :: Chapter 53 - Machine Guns, Destructive Devices, and Certain Other Firearms :: Subchapter B - General Provisions and Exemptions :: Part I - General Provisions :: Sec. 5845 - Definitions
Read the discussions if you have the time. An apparent flaw was discovered and some folks on ar-15.com and Snipers Hide have come up with a fix.
Yeah, we all know the "bump stock" has been deemed a "machine gun" and therefore illegal by the ATF. We also know that's bullshit because technically it doesn't meet the legal definition. Will the FRT-15 trigger meet the same end? Who knows but this is still America and the 2nd Amendment is still law of the land as is 26 USC 5845(b) even though the ATF has illegally changed its meaning.
Would I buy one of these? Damn right I would. But first I'd like to see the company make these 100% functional. That little spring can turn these into expensive paperweights.