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4/1/2025 7:47:26 PM EDT
[Last Edit: prebans][Edited]
Most people know about Uzi bolts, HK sears, the AR15 DIAS and LL, etc.  There’s currently a discussion of a TSMG firing pin converter.

Other stuff I remember:

Uzi sears:  They do exist but should be avoided.  The sear is arguably the heaviest wear part in an Uzi.  It also requires that the existing semiauto sear holes be widened.  

AK sears:  Disallowed if not already installed when the ruling came down because the receiver had to be modified.  Those which were already installed and sold to innocent buyers were grandfathered and permanently married to the receiver..

Ruger MK1 and 10/22 solenoid briefcases:  I last saw these for sale at Only The Best Firearms.  The gun is a semi but someone installed a solenoid firing attachment in the briefcase.  Push a button and it keeps firing, meaning it’s a machine gun.  I don’t know if the solenoid itself is the MG and/or what part is registered.

Smith & Wesson 659 sears:  Someone made a sear (or sears) for the 659.  I’ve been told they’ll work with some other models of S&W semiauto pistols too.  I know of one for sale in a 5906.

Beretta 92 sears:  Not all of the Beretta 93 guns out there are registered receivers.

Mac-10 registered bolts:  A few were made and papered.  They only work with the original open bolt models.

Mac registered triggers:  I am only familiar with these because someone put them into a

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" target="_blank">semiauto PKM.  Given how conversion parts are supposed to remain with the same “family” of guns, I’m raising an eyebrow but wish them the best.

AK registered pistol grip:  Given how it doesn’t affect function or change how a semiauto AK’s parts function with each other,

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" target="_blank">I’m raising the other eyebrow.

Remington 1100:  Not a conversion part, but L&L Machine Guns in Oklahoma sold a transferable Remington 1100 which came from the Osage (OK) County Police Department in the early 2000s.  Haven’t seen it or another available since.

What weird ones have you seen?
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
4/2/2025 12:08:34 AM EDT
[#1]
Some of those S&W sears have been shoe-horned into custom glock switches and are being sold as such.

POHF had/has one.
4/2/2025 12:35:38 AM EDT
[Last Edit: EnablerNo1][Edited] [#2]
The registered UZI sears aren’t bad. I’ve never heard of an Uzi sear actually failing. A friend has one installed in a closed bolt mini Uzi and it’s a very cool setup.

Additional oddballs:
- Registered and engraved GI m16 autosear installed in a lower that had to be drilled for the autosear pin hole. Forever married. Fleming did some of these.
- Registered receiver M16 conversion that was not drilled for the autosear pin hole and has an unserialized unregistered DIAS installed.
-HK with registered sear that had the front trigger group pushpin drilled to use a swing down trigger group. Forever married unless the host is destroyed despite the fact that Vollmer v. Higgins was ruled in Vollmer’s favor.
4/2/2025 6:07:00 AM EDT
[#3]
Quote History
Originally Posted By JoshNC:
The registered UZI sears aren't bad. I've never heard of an Uzi sear actually failing. A friend has one installed in a closed bolt mini Uzi and it's a very cool setup.
View Quote
+1, I wrote the conversion article on Uzitalk.com and have a Fleming registered UZI sear married to a receiver.
The semi mini receivers came in the US in 1987 when we all know the ban was in 1986.  Fleming was taking regular UZI sears and not doing anything to them and registering them.  So he would modify the Mini trunion's to accept the 'feet' of an open bolt as well as increasing the holes in the receiver to accept the larger SMG sear and modifying the lower.  He was also removing the blocking bar from full size UZI receivers.  I had one of those too and sold it to a friend.
ATF caught up with him in 1988 and made him permanently marry them to receivers and those receivers are marked with Fleming Firearms, OK and the SN of the Sear as well on the bottom.
So the Fleming Mini UZI sear gun is/'was' the only way you could get a transferrable Mini UZI that is made from an UNcut / re-welded UZI receiver like Vector was doing.

I say was because as some of you know ATF recently classified some Pre-may Mini UZI's that came in to PD's as transferrable.  

Now as I mentioned he also did registered sears for the full size and Micro UZI's.  Both of those came into the US as semi's pre-1986 so I would agree a RR would be more desireable for those two variants but not for the Mini.  
The Mini is my favorite UZI variant and my Fleming sear Mini would be the last I would get rid of.
4/2/2025 7:07:24 AM EDT
[#4]
Originally Posted By prebans:
Smith & Wesson 659 sears:  Someone made a sear (or sears) for the 659.  I’ve been told they’ll work with some other models of S&W semiauto pistols too.  I know of one for sale in a 5906.
View Quote

There was an article in Small Arms Review maybe 15 or 20 years ago detailing the S&W sear guns. Seems like a dozen or 20 were registered pre-‘86.

I’ve shot a postie a couple times. Fun, but about as practical as a Glock 18 or similar.
4/2/2025 9:20:41 AM EDT
[#5]
Fair enough!  If they’re holding up, they’re holding up.  I was always worried about the sear’s feet being a problem.

Looks like there’s a limit of GB links.  I’ll have to re-make this into two posts.
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
4/2/2025 10:39:35 AM EDT
[#6]
I was talking to a friend of mine about the transferable AK Grip on Gunbroker last week.

I do not see any legal way to actually use this item to convert a semi AK variant of any type into a machinegun today.  You are going to either be modifying the receiver into a machinegun (drill an autosear hole) or making some sort of drop in auto sear type device (which would also be a machinegun unto itself) There is just no way a wood grip is ever going to mechanically convert a semi-auto AK into a machinegun and then have the machinegun convert back to a semi-auto by just removing the grip.

IMHO, this grip is basically a legal defense if you are caught with an illlegal AK-ish variant machinegun by making the claim the unregistered post-86 machinegun is kosher because this grip is bolted on.



Most likely somebody will use this grip to make a rare beltfed like an RPD or PKM and then sell it to some unsuspecting buyer, similar to his Broadhead M11 trigger shoehorned into a full auto PKM where the PKM itself is most likely now a machinegun on its own.  Would love to see how an open bolt MAC trigger mechanically converts a closed bolt semi-auto PKM into a machinegun.



These are recent new additions of the creative transferable AK world, which are conversions of the Italian Armi Jager AK22 converted into PP-19s.



One of my friends has a transferable electric solenoid briefcases.  (The registered component is the aluminum plate that is bolted into the bottom of the case that holds everything together.)  Its a bit nerve racking to shoot as you can't load a mag with the pistol locked into the briefcase.  You have to basically load the gun, then install a loaded pistol into the case while getting the little actuator arm right next to the trigger, take it off safe, close it all up, and then push the button and hope it doesn't have a malfunction or some sort.  The neat part is you can dial in the RPM via the modern PWM controller.



I have seen random transferable sears (not Smith 659) shoehorned into Glocks.   Only the Best had one a couple years back.



My personally created/owned transferable oddity, that I call the "G-Faketeen".  

M11A1 converted to 9mm, Tungsten CF-W bolt, custom barrel with comp, and a Metal Glock Mag lower.  Basically a cheaper route to a transferable 9mm machine pistol.  Its actually a lot of fun to shoot in machine pistol form and is surprisingly controllable.
4/2/2025 10:51:46 AM EDT
[#7]
I've never seen one, but from what I've read there are a few registered AR-7's that have the FCG modified for full auto only.  IIRC, the late Paladin Press sold the 'how to' booklet.  The problem was, there's no room or positions available in the AR-7 to accommodate anti-bounce technology.  So one ended up with a short burst fire gun.  It was also apparently possible to convert an AR-7 to open bolt, full auto operation which avoids the bolt bounce issue, but which would also require modification of the bolt.  I don't know if that ever went past the prototype stage.

MHO, YMMV, etc.
4/2/2025 10:53:29 AM EDT
[#8]
Is that one of the glock-macs that Len made with race frame grips? I think someone else was planning on machining custom grips but never did.
4/2/2025 11:02:58 AM EDT
[Last Edit: jbntex][Edited] [#9]
Quote History
Originally Posted By SGT-Fish:
Is that one of the glock-macs that Len made with race frame grips? I think someone else was planning on machining custom grips but never did.
View Quote


Its is not a Len / Historic conversion.

I did all the conversion work using a MPA M11 Glock Lower Grip Frame.

I really didn't want to do any welding of non-like material (steel receiver to stainless steel race frame) and it looked like you would be putting a lot of heat into a thin sheet metal M11 frame to weld on a metal glock lower.

There was also custom weld work with a new trigger guard that was fabricated on the example I have seen. The overall grip also looks to end up being shorter as well as where the race frame get cut didn't look to easily marry up to the M11 receiver once the glock grip portion was cut off the upper portion of the race frame lower. Those guns also looked to need custom modded glock mags done as the mag release in the race frame doesn't appear to be in the right spot to hold an OEM glock mag correct to the M11 bolt and barrel.  

The way I did my gun would technically allow me to weld the OEM MAC grip frame back on if I ever wanted to go back to the 2x4 style mac grip and also removed all of the welding risk to the M11 frame as well.
4/2/2025 12:17:23 PM EDT
[Last Edit: osprey21][Edited] [#10]
There was also a Uzi "kicker" conversion - supposedly there are about 12 of them in the registry.

If you have, or have access to one, there's an article about them in the below issue of Firepower Magazine. The same article also talks about the "Two-Step" Uzi conversion.
4/2/2025 3:42:33 PM EDT
[#11]
Quote History
Originally Posted By osprey21:
... The same article also talks about the "Two-Step" Uzi conversion.

https://www.ar15.com/media/mediaFiles/766/Firepower_September_1984-3506269.jpg

View Quote

For recovering MAC-aholics?
4/4/2025 4:09:33 PM EDT
[Last Edit: prebans][Edited] [#12]
Quote History
Originally Posted By osprey21:
There was also a Uzi "kicker" conversion - supposedly there are about 12 of them in the registry.

If you have, or have access to one, there's an article about them in the below issue of Firepower Magazine. The same article also talks about the "Two-Step" Uzi conversion.

https://www.ar15.com/media/mediaFiles/766/Firepower_September_1984-3506269.jpg
View Quote


I used to have four or five dozen copies of that issue!

Some guy was selling an issue at a gun show, which I was ready to buy.  “Want more?”  He yanked out boxes with 300 different issues.  They were all in brand new shape.  “Where the hell did you find so many pristine issues of a (then) 20-year-old magazine?”  Turns out he was the publisher’s ex son-in-law!

$20 later, I’m lugging every box to my car clear across three parking lots.  

Ended up selling most of that issue through UziTalk and others through eBay and other boards.  I think (?) I’ve still got a handful left.  Ended up making more profit off that box of Firepower than I made off everything else combined from the next couple of shows.

So few people even know anything like that was ever published.
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
4/13/2025 9:56:50 PM EDT
[#13]
If anyone has info or pictures of the Whitbrot conversion for the S&W 59 series guns, I would love to see it. Im trying to round up details and make a post sample example. Found some info, but no pictures or details of the actual device yet.
" Laziness is an essential part of all walks of engineering."
4/14/2025 4:19:41 AM EDT
[#14]
I believe there are some interesting M2 Carbine registered components but can’t recall what they are.
4/14/2025 5:13:59 AM EDT
[#15]
Quote History
Originally Posted By notso:
If anyone has info or pictures of the Whitbrot conversion for the S&W 59 series guns, I would love to see it. Im trying to round up details and make a post sample example. Found some info, but no pictures or details of the actual device yet.
View Quote



Similar to this?
https://www.ar15.com/forums/armory/Sandamp_W_5906_machine_pistol/17-255366/
4/15/2025 2:33:59 PM EDT
[Last Edit: Roaster72][Edited] [#16]
For posterity I am posting this email I revceived in 2015 from Dan Shea regarding registered Ruger Mark II pistols:

"General info, I don’t like to post this stuff…. I made a couple in 84 that didn’t work very well, Armitage international (Greg Davis) registered 15 transferable receivers, sold 14 to me in 1988, I had a gunsmith building them out as two stage  trigger, integrally suppressed, with lasers…. He took the money and never finished them… I sold the pile to another guy who had a plan to finish them. Big mess.

So, I’m aware of 17 being registered before 19 May 1986, and have heard of a couple of others. If I guessed, there could be 20 transferable Ruger MKII machine pistols. There could always be more….  A lot of guys registered every semi-auto in their vault when the law was passed, so there is some weird stuff out there…."
4/16/2025 7:07:26 AM EDT
[#17]
Quote History
Originally Posted By Roaster72:
For posterity I am posting this email I revceived in 2015 from Dan Shea regarding registered Ruger Mark II pistols:

"General info, I don’t like to post this stuff…. I made a couple in 84 that didn’t work very well, Armitage international (Greg Davis) registered 15 transferable receivers, sold 14 to me in 1988, I had a gunsmith building them out as two stage  trigger, integrally suppressed, with lasers…. He took the money and never finished them… I sold the pile to another guy who had a plan to finish them. Big mess.

So, I’m aware of 17 being registered before 19 May 1986, and have heard of a couple of others. If I guessed, there could be 20 transferable Ruger MKII machine pistols. There could always be more….  A lot of guys registered every semi-auto in their vault when the law was passed, so there is some weird stuff out there…."
View Quote


Thank you!  I always appreciated when he spoke about more obscure stuff like that.

Today I also remembered when I saw a dedicated papered Uzi bolt conversion in .22 for sale on Subguns.  Haven’t seen it crop up  since, but I’d bet that’s a one of one conversion part on the registry.
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
4/16/2025 10:57:31 PM EDT
[#18]
Some that I've seen discussed over the years:

- 10/22 trigger packs
- 1919 sideplates
- Mac triggers
- M2 carbine trigger bars, trigger groups, and probably others
- The FNC sears and AR lightening links that we all know about
- Pretty sure I saw a transferable 1911 sear listing
- Tec 9 bolts
- I also recall M16 registered bolts existing and a thread here discussing how they'd work and if they'd be married to a modded lower
4/22/2025 8:55:57 PM EDT
[Last Edit: whiskerz][Edited] [#19]
Quote History
Originally Posted By peachy:
I believe there are some interesting M2 Carbine registered components but can’t recall what they are.
View Quote




Many years ago I met a guy who registered a set of M-2 Carbine conversion parts during the 68 Amnesty. I worked for Len when we did the M11/380 conversions to 9 mm. We had no issues with the welding of the mag well. They ran great and never came back for warranty or repairs. We also had 10 of the registered Mac 10 triggers pass through. The ATF was clear they could only be used on Macs. But the ATF can change when you ask again in a week. I have seen BHP's out there online but never in person.
RIP Jeff Reed. Tennessee Squire, Ga. Carry member, NRA,Non-puking 72 ounce drinker 2 of 6 Norcal call sign, Forgotten.
5/13/2025 12:19:28 PM EDT
[#20]
This isnt a weird gun, but a weird marking.

Reuben has a Sendra with the conversion marking on the grip. Ouch.

Attached File
Dan_Gray: You're right
5/14/2025 12:00:27 AM EDT
[Last Edit: EnablerNo1][Edited] [#21]
Quote History
Originally Posted By far_right:
This isnt a weird gun, but a weird marking.

Reuben has a Sendra with the conversion marking on the grip. Ouch.

https://www.ar15.com/media/mediaFiles/89054/Grip_Marked_M16_jpg-3539663.JPG
View Quote


Are you referring to the LoneStar Ordnance markings on the grip? If so, that’s not the makers markings, that’s the company that made those grips. Above the grip on the receiver, below what appears to be weld adjacent the selector axle it’s marked “PHX”. I bet it’s a Weapons Specialties conversion.
5/16/2025 9:47:15 AM EDT
[#22]
I have seen a registered M2 carbine selector switch.

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