Reg HK sear vs Reg Trigger pack

What are the Pros and Cons of each?

Reg pack is a factory full auto pack, cut to fit a semi shelf receiver

Reg sear is a sear whose axis pin is in a slightly different location, fitted to a modified semi trigger pack.

A reg pack can use factory replacement parts, but you're stuck with that trigger pack body.

A reg sear can move from trigger pack to trigger pack, if you want and can cram it in there.

Id say a sear is potentially more versatile, at the cost of being much more fragile.

ok, So what can a Pack Not do again?

They can both be used on several hosts. Main pro of the registered trigger pack is it's very close to factory specs. The main pro of the sear is it can be used in a Navy trigger pack. So if you like the SEF trigger packs I say go with registered trigger pack. If you just have to have the Navy pack then get the registered sear. But I'd be happy with either. both are good, depends more what you can find for a good price.

ETA to clarify terminology -

"Trigger housing" is the metal or plastic outer shell that encompasses the pistol grip.

"Trigger pack frame" "Trigger frame" or "Trigger box" is the metal shell that fits inside the trigger housing, and holds all the mechanical guts of the fire control group together. For brevity, I will use "box", and it is the box which is usually the registered component of a registered trigger pack.

"Trigger pack" is the metal box with all FCG parts installed.

"Trigger group" is the combination of housing and pack.

Depends on the pack which was modified. If the original builder modified a vanilla 0-1-A pack, then you'll never be able to stick an ambi safety on it, and I don't know if the 3rb internals will fit, for instance. If the original builder happened to modify an ambi 0-1-3-A pack, then there are really no limitations on what you could build with it. I guess it's possible the reg'd pack could be modified to fit other factory parts sets, too, but I haven't seen that done too often.

The registered sear can be used with any SEMI trigger box or pack you can cram some full auto internals into. That could include a semi trigger box you had made special to fit the ambi 0-1-3-A internals. But, you can't just modify a 0-1-3-A auto pack or box and install your sear in it, it has to start as a semi box, iirc. Modifying a full auto pack or box to fit a ledge gun, now, even to install a registered sear in it, would be making a post-sample trigger pack.

Technically you can still mod a full auto box to fit a semi-auto shelf but you have to cut away the original factory sear pin hole location.

So you can take an SEF full auto trigger box (or any one for that matter) and turn it into semi-auto spec ledge style box. The big no-no would be modifying a full auto trigger box to fit a semi-auto receiver and leaving the original sear pin hole intact.

Cut a trigger box to look like the one in the top in the picture below =OK
Cut a trigger box to look like the one bottom picture = NOT OK.



Back to your question about the pros and cons.

As circuits mentioned a sear can more easily go into the modern style trigger frames that most people want with the cute little bullet logos and the ambi selector lever which I refer to as the "picto" housings. The two primary flavors of Picto housings are the "Navy" 0-1-A or "Burst" -0-1-3-A.

Basically to install a sear into a Picto trigger box a modern trigger box and trigger frame is cut to fit a semi shelf gun (removing the original sear pin location) and the conversion sear is installed utilizing the semi sear spring axiz pin location.

Technically the sear may be more delicate but I have never heard of a Fleming or Qualified sear breaking.

The registered trigger boxes that I have seen are all old style SEF trigger boxes so you are more or less stuck with the older metal/plastic trigger housings or the all plastic SEF contoured housings. I have heard that these SEF triggerboxes can be converted into Picto style trigger box but it involves cutting and welding surgery on your $15K registered part, which most folks prefer to avoid and just buy a sear instead.

If you want to use a SEF trigger housing than go for registered trigger box as you can use more factory parts. If you think you may ever want to run a Picto style Housing than get sear.

Thats my take anyway.

Hope this helps.

I've got a registered DLO trigger housing... I would definitely recommend buying a pack. No timing issues, all factory parts, etc. The only major advantages of a sear are A) price, and B) that fact that it will be easier to switch to a ambi/burst housing.

oh so sears are more $$

No, sears are cheaper than registered trigger packs. Figure an extra $2k or so for the pack.

Thanks, James! That's good to know.

Thanks all again.

these HKs (RRs), sears, and packs are tricky for some reason to me.

Welcome to the club.

Sears are slightly less that registered trigger boxes. Granted the only person I am aware of that ever has registered trigger boxes for sale is Doug at DLO and I beleive he has been asking $15K for some time and they are not flying off the shelves as he is obviously not making any more and has had his limited inventory available for quite some time. The rest of the components to finish out the SEF trigger pack are probably not much more than $150. I beleive that Tim LaFrance did some registered trigger boxes that come up from time to time as well and are usually priced in line with Doug's inventory.

Uninstalled Raw Sears depending upon the maker (Fleming H and Qualified K series bringing the highest dollars) seem to run about 13 to 14K on the secondary market. However, if you get one already installed in an modified picto/ambi style pack with (0-1-3-A) packs comanding the highest premium will probably cost you the same as a registered trigger frame from DLO at right about $15K give or take a grand.

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