Magnetic 9mm AR delayed blowback recoil system

[DanKATL]

Taccom has a PCC delayed blowback system using magnets. Looks like it replaces the weight in the bolt by the description.

https://taccom3g.com/product/delayed-blowback-9mm-recoil-system/

Thoughts on these? Has anyone seen one in the wild? cmshoot

I don't like this part about LRBO "*Short stroke system will not allow for the automatic use of the Bolt Hold Open feature".

 

[ReservoirDawg10]

I don’t know if i like the idea of magnets in my rifle

 

[spencer60]

OK... I can see that moving one of these heavy-duty magnets through a steel tube could cause some drag effects that would resist the bolt coming moving back. Those magnets are powerful, but I really wonder if they would provide anything significant against the 30,000 PSI a 9mm generates.

The fact that they call it a 'short stroke' system is interesting, since that's usually a problem, not a solution. If they are not allowing the bolt to go all the way back though, I could see it not working with a LRBHO system.

It seems like it could introduce problems as well though. If the bolt has a shorter travel, then the 'delay' introduced by the magnets is being offset by that shorter travel. Depending on the delay it could leave you right back where you started, or even worse off, although if the delay is really long you could end up with a sifter shooting gun as they claim.

I also have to wonder how much of the claimed improvement is coming from that heavy magnet compressing the spring around the shaft it's mounted on. The sheer inertia of that chunk of metal would slow the bolt significantly as well, probably far more than the magnetic fields against the buffer tube would.

Last but not least, how do you get it out of the buffer tube? Again, those magnets are strong... I have them holding up full sized guns to the 'ceiling' of my gun safe. Once you put it into a steel buffer tube and it's recessed down inside, how are you going to get it out again?

Do you compress it and let it try and 'jump' out of the buffer tube enough to get a grip on it? There's no way you'll be getting any kind of tool in there to pry it out. If you have another magnet the right size you might stick it to the one on this part, but it would have to be strong enough to resist the new, stronger magnetic field that would be generated with the buffer tube to pull this assembly out.

Seems to me that simply moving to a heavier buffer, or something like the JP spring kit might be a better use of your money than this.

 

[DanKATL]

...Last but not least, how do you get it out of the buffer tube? Again, those magnets are strong... I have them holding up full sized guns to the 'ceiling' of my gun safe. Once you put it into a steel buffer tube and it's recessed down inside, how are you going to get it out again?

Do you compress it and let it try and 'jump' out of the buffer tube enough to get a grip on it? There's no way you'll be getting any kind of tool in there to pry it out. If you have another magnet the right size you might stick it to the one on this part, but it would have to be strong enough to resist the new, stronger magnetic field that would be generated with the buffer tube to pull this assembly out.

Seems to me that simply moving to a heavier buffer, or something like the JP spring kit might be a better use of your money than this.

I wondered about how it worked, from the description it replaces the weight in the carrier/bolt. There's also mention of removing the buffer retaining pin.

 

[cmshoot]

 

[spencer60]

I wondered about how it worked, from the description it replaces the weight in the carrier/bolt. There's also mention of removing the buffer retaining pin.

The thing is I don't see how they could replace any weight in either of those unless they are also supplying a custom, lightweight bolt and carrier.

 

[WildMan]

Certainly sounds ingenious.

Wonder how well and how long it works. Also wonder how the firearm operates as the magnate stops working.

 

[Dirty J]

I’ve got one. Taccom makes some really innovative stuff for the AR9’s.

The idea is the lessen the reciprocating mass.

The buffer is rather light.. and you remove the weight from the bolt. The magnets really do take a good big of force to break loose. Time will tell how they hold up over 10’s thousands of rounds.

I’m still shooting my MPX as my main blaster for USPSA, but recently built a blowback based on this buffer system.

Ive got several major matches to train for through September, so I won’t have much time to give to this until after then.

 

[DanKATL]

I’ve got one. Taccom makes some really innovative stuff for the AR9’s.

The idea is the lessen the reciprocating mass.

The buffer is rather light.. and you remove the weight from the bolt. The magnets really do take a good big of force to break loose. Time will tell how they hold up over 10’s thousands of rounds.

I’m still shooting my MPX as my main blaster for USPSA, but recently built a blowback based on this buffer system.

Ive got several major matches to train for through September, so I won’t have much time to give to this until after then.

Thanks for the info. Any problems with the magnets picking up junk so far?

 

[Dirty J]

Thanks for the info. Any problems with the magnets picking up junk so far?

It’s only got like 400 rounds on it. Still doing load development to see what I like in it.

You don’t generally see too much debris make its way back to the buffer... and the magnetic surfaces are fairly well sealed from the outside.

If you’re not sold on the idea.. their 3 stage buffer system is great. I ran one of those when I used a blowback gun for USPSA.