Derya MK12 light and heavy loads ring

Fiks

Fiks

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I have the light loads ring installed on my MK12 every things works fine, light target load (challenger) cycles well, buckshot too, slugs I have jams once in a while but I think its more because of my rounds... but overall everything seems to cycle well with the light loads ring.

When should I use the heavy loads ring, for hunting rounds?? And what is it suppose to do, absorb more recoil? Can I break anything by leaving the light loads all the time?
 
The light loads ring allows more gas to act on the piston.

I'm willing to bet the problem your having with slugs is the magazine cant keep up with the bolt speed the slug produces. I had the same issue and switching to a heavier mag spring resolved the issue.
 
JayCarver said:
The light loads ring allows more gas to act on the piston.

I'm willing to bet the problem your having with slugs is the magazine cant keep up with the bolt speed the slug produces. I had the same issue and switching to a heavier mag spring resolved the issue.
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That sounds like a good idea, but I'm willing to bet that that's what the heavy ring is for! To lessen the amount of gas pushing the bolt open. Buckshot and slugs are considered heavy rounds. Using the light ring with these heavier shells, could damage your gun by having the bolt fly back too fast and maybe batter the reciever. The heavier spring in the mag might allow a round to be stripped, but will it slow down the bolt enough to not cause damage? I would use the rings as intended in the manual and change them out as required, or if something gets broken, you might not have any recourse with any kind of warranty claim. If they see that the receiver is all battered to hell and something is broken, I'm pretty sure they can put 2 and 2 together and deduce that you were shooting heavy loads with the light ring installed!
 
I ran 100 sport slugs and 50 buckshot through mine to break her in. Used the light load ring with no excessive wear on the buffer, bolt or receiver.

If I was running 3” hunting loads and magnum loads consistently then I would swap. Out the light ring for the heavy one but if you are primarily using 2.75” birdshot with the occassional 2.75 slug/buck loads then I doubt you’ll have much to worry about.
 
Smitsauce said:
That sounds like a good idea, but I'm willing to bet that that's what the heavy ring is for! To lessen the amount of gas pushing the bolt open. Buckshot and slugs are considered heavy rounds. Using the light ring with these heavier shells, could damage your gun by having the bolt fly back too fast and maybe batter the reciever. The heavier spring in the mag might allow a round to be stripped, but will it slow down the bolt enough to not cause damage? I would use the rings as intended in the manual and change them out as required, or if something gets broken, you might not have any recourse with any kind of warranty claim. If they see that the receiver is all battered to hell and something is broken, I'm pretty sure they can put 2 and 2 together and deduce that you were shooting heavy loads with the light ring installed!
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That's all well and good if your feeding it a stedy diet of heavy loads. But when I'm only shooting about 50-1000 slugs per 3,000 rounds of light bird shot it isn't realistic.

FWIW I've not seen any damage or battering from shooting slugs with the light ring.
 
I have one and I love it. Mine didn't come with the two different rings for light or heavy though. Maybe they changed the design before or after I got mine, not sure.

Mine seems to eat everything I put through it, but every now and then, a cheap target load will not operate the action in some way. Most likely because I'm shooting super cheap loads that have crappy quality control and the powder drop wasn't quite the same as the other rounds, or I've also seen that the crimps are crappy and out of round, causing FTE or stovepipes. Never had an issue with any quality target rounds or any slugs, buckshot, or hunting rounds.
 
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