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Discussion Starter · #1 · (Edited)
Got the green light to "buy myself a present" from the wife.

Found a registered-receiver (qualified MFG) HK21 for 35k at a dealer in my state.

1. Is 35k too high?
2. Can I divorce the sear? I've heard of people doing this.
3. Should I just buy a sear instead?
4. Can I get a sear for 27-29k if I'm patient?

New Development:

The sear is married to the gun. it's currently on a form 3 at my dealer.

The sear was once multi cal but the ATF asked them to change it to 762 Only.

So.. .question is... How hard is it to divorce a sear? and, can we reverse the "you can only have 1 cal" situation?


 

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$27k- $29k for a HK sear, You might be a little late to the game, but deals do happen. The RR 21 is a one trick pony, that being a bad ass pony. The 21 is older tech than the "newer" 21e clones available now. The sear in this 21 can not be divorced as the RR is the registered part. I would think that the 35k for this in state 21 might be 2k high, maybe not to bad if in near mint condition.

Given the "green Light" on a 30k purchase is, well your lucky.

Good luck, like to hear your decision.
 

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1. Is 35k too high? Yes it is too high, I would think ~$30k ish. I would not go this route, but it is your call. RR HK21 is fun, but that is all it will ever be.
2. Can I divorce the sear? I've heard of people doing this. This is not a sear it is a RR, so it cannot be divorced.
3. Should I just buy a sear instead? I recommend a sear and then buy hosts that fits your needs/wants :). You can buy belt feds, sub's and MG of any HK RL style.
4. Can I get a sear for 27-29k if I'm patient? Never say never, but probably need to be prepared to pay a little more, especially if it is in your state.


Got the green light to "buy myself a present" from the wife.

Found a registered-receiver (qualified MFG) HK21 for 35k at a dealer in my state.

1. Is 35k too high?
2. Can I divorce the sear? I've heard of people doing this.
3. Should I just buy a sear instead?
4. Can I get a sear for 27-29k if I'm patient?
 

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The Librarian
MP5-N and HK23E-K
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5,703 Posts
You can always ask if it's a sear gun and before you pay, give the form 4 a look. If it is indeed a sear gun, Form 4 should say as follows:
4.a. Maker of sear
4.b. Machinegun Auto Sear
4.c. N/A
4d. HK
4.e. N/A
4.f. N/A
4.g. serial #0000 (of the sear, not gun)
4.h. Installed in H&K 93/33 #A00000
 

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Given the way prices are going and general versatility, you'd be much better served in getting the sear (which are running in the low to mid 30's currently) and either run it in an existing host or buy your self a less expensive host for the time being. Then save up for a MM21E that you can run with the sear. That way you can continue to expand your full auto collection with much cheaper hosts, rather than being just stuck with (an awesome) beltfed.

Now, if you already have an extensive collection of full auto RR HKs and you are just looking to fill a beltfed slot, then maybe I could see going for the RR HK21, but even then you still might be better served to spend a bit more and get a sear and an MM21E. That way if something crazy happens in your life and you were absolutely forced to liquidate some of your collection, you could still keep the sear and rebuilt a host based collection down the road (granted, that's a rather crazy scenario I just made up there).
 

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Discussion Starter · #9 ·
New Development:

The sear is married to the gun. it's currently on a form 3 at my dealer.

The sear was once multi cal but the ATF asked them to change it to 762 Only.

So.. .question is... How hard is it to divorce a sear? and, can we reverse the "you can only have 1 cal" situation?
 

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The Librarian
MP5-N and HK23E-K
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@SudS has done this before (I believe) and hopefully he can chime in. Essentially you write the ATF to let them know you intent to divorce the sear from host. Once they acknowledge your letter, you may swap between hosts. Also note the caliber for a sear is N/A. ATF stopped accepting multiple or any caliber designation.
 

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This sounds A LOT like an 'improper conversion'.

i.e. the receiver is a 'push pin' and also has a conversion sear. If that's the case its not divorce-able, and might be the reason the ATF had the form changed to 7.62 only.
 

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This sounds A LOT like an 'improper conversion'.

i.e. the receiver is a 'push pin' and also has a conversion sear. If that's the case its not divorce-able, and might be the reason the ATF had the form changed to 7.62 only.
I did not read that it had a pushpin trigger housing. But, if it did, and the sear is a registered MG, couldn't the 21 receiver be rendered a legit semi by welding on a shelf? Perhaps with prior ATF approval? Just spit balling here.
 

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Discussion Starter · #14 ·
@SudS has done this before (I believe) and hopefully he can chime in. Essentially you write the ATF to let them know you intent to divorce the sear from host. Once they acknowledge your letter, you may swap between hosts. Also note the caliber for a sear is N/A. ATF stopped accepting multiple or any caliber designation.
So, I could run it on any cal host?

Also, I can get a 9mm DLO box for 30k.. is that a good deal considering the caliber limitation?
 

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The form 4/3 will tell all here.........if its a push pin you have the option of demilling the receiver and keeping the sear but you cannot have two MG's at same time.........if it indeed is just a sear then a divorce would all you would need.....but from what I know they only married sears to guns that would otherwise be considered SBR's.....but let SudS chime in he knows more in his right pinky than I could ever learn..........
 

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The Librarian
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I bought a HK94 with a chopped barrel and S&H sear last year. It was "married" to the 94. I submit 2 form 4. One for the 94 because removing the sear would make it an illegal SBR and the other for the sear. Instead of indicating 9mm for the caliber on the sear. It was left N/A. For that HK21, it's outside my own experience (not as simple as just submitting a form. All I can add is just make sure it's not a PP and sear gun. I have seen one before and outside my comfort level.

Also, my HK94 was redone by TSC machine as a factory gun so a form 2 was done as part of the process.
 

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The form 4/3 will tell all here.........if its a push pin you have the option of demilling the receiver and keeping the sear but you cannot have two MG's at same time.........if it indeed is just a sear then a divorce would all you would need.....but from what I know they only married sears to guns that would otherwise be considered SBR's.....but let SudS chime in he knows more in his right pinky than I could ever learn..........
As long as the registered sear is not married to a push pin gun (rare circumstances), this is a very simple issue. That's also presuming there are no legal restrictions in the state/local jurisdiction you live iin. However, presuming the 21 does not have a barrel less than 16", this marriage is really only a sham marriage. Since you would not be creating an unregistered SBR (like in the case of an MP5 sear divorce), I don't believe there are any problems with removing the sear at any time. I would recommend writing the divorce letter to ATF just to create a record for the file.
 
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