Homemade Bullpup with AR-15 Lower Receiver

[ARCHIVED THREAD] - Homemade Bullpup with AR-15 Lower Receiver (Page 1 of 3)

Posted: 11/28/2011 4:56:28 AM EDT

http://www.thefirearmblog.com/blog/2011/11/28/longziz-1-an-interesting-homemade-bullpup-with-ar-15-lower-receiver/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheFirearmBlog+%28The+Firearm+Blog%29

Longziz #1: An Interesting Homemade Bullpup with AR-15 Lower Receiver

Longziz purchased his first AR-15 when he was studying in the USA and it inspired him to design his own rifle. A few years later, now studying in Germany, he has unveiled his patent-pending design which he named the Longziz #1.

The rifle is fully ambidextrous. It uses AR-15 lower receiver and trigger group internally. The AR-15 trigger group is connected by a trigger linkage to the forward bullpup trigger (he admits the trigger, like most bullpups, has an awful feel to it).

The triangular Longziz #1 bolt carrier next to an AR-15 carrier.

The AR-15 lower inside the Longziz lower.

Using an AR-15 lower receiver internally is genius. It means he could sell the rifle as a kit (minus the AR-15 lower) without having to be licensed with the BATFE.

Posted: 11/28/2011 4:59:37 AM EDT

[#1]

Posted: 11/28/2011 5:04:41 AM EDT

[#2]

Depending on cost. I would buy it!

Just the conversion kit? I need to supply the barrel and lower and sights?
I'd go maybe $700 if getting good reviews.

Posted: 11/28/2011 5:06:14 AM EDT

[#3]

Neat, but I wonder what it does for the upper receiver?

If that were to be manufactured, I guess since it would need an AR lower (and probably modifications to that) the bullpup stock setup wouldn't need to go through an FFL.

Posted: 11/28/2011 5:10:19 AM EDT

[#4]

I'm not clear on how he dealt with the buffer

Posted: 11/28/2011 5:12:03 AM EDT

[#5]

Do want!

Posted: 11/28/2011 5:12:41 AM EDT

[#6]

That's actually pretty nice looking. Wouldn't mind having one as long as it doesnt cost a fortune.

Posted: 11/28/2011 5:12:46 AM EDT

[#7]

Cool

Posted: 11/28/2011 5:13:36 AM EDT

[#8]

The way to fix the trigger is to make it electronIc.

Posted: 11/28/2011 5:15:36 AM EDT

[#9]

Quoted:

The way to fix the trigger is to make it electronIc.

Or hydraulic-IIRC, there are offroad motorcycles with hydraulic clutch lines that outlive the motorcycles their installed on.

Posted: 11/28/2011 5:19:46 AM EDT

[#10]

Quoted:
I'm not clear on how he dealt with the buffer

Piston upper?

Posted: 11/28/2011 5:22:00 AM EDT

[#11]

Quoted:

Quoted:
I'm not clear on how he dealt with the buffer

Piston upper?

That's what it looks like. and the bolt is much shorter, I would guess that helps with the limited space rearward of the bolt.

Posted: 11/28/2011 5:22:36 AM EDT

[#12]

Quoted:

Quoted:
I'm not clear on how he dealt with the buffer

Piston upper?

Looks like he's going the ZM weapons route, using a cut down AR bolt and the recoil spring on the piston.

Posted: 11/28/2011 5:23:10 AM EDT

[#13]

Very neat idea. I'm sure guys with C-III AR's would be interested as well.

ETA: He's a member here.

http://www.ar15.com/forums/t_3_118/554275_Longziz__1__a_new_way_to_use_an_AR_lower_receiver.html&page=1

Posted: 11/28/2011 5:23:18 AM EDT

[#14]

You guys are way behind the curve. He posted his story in the AR forum http://www.ar15.com/forums/t_3_118/554275_Longziz__1__a_new_way_to_use_an_AR_lower_receiver.html

Curiously, the mods locked the topic twice because he wasn't a paying industry partner. Guess they'd rather have threads about DD vs. BCM and 14.5" vs. 14.7", not innovative, fascinating new AR products.

Posted: 11/28/2011 5:23:21 AM EDT

[#15]

Quoted:

Quoted:

I'm not clear on how he dealt with the buffer

Piston upper?

Obviously

A. Very short BC

B. No gas key

Posted: 11/28/2011 5:25:53 AM EDT

[#16]

I'm not a bullpup fan, but that's pretty cool and depending on the pricepoint, I might be willing to give it a whirl!

Posted: 11/28/2011 5:28:19 AM EDT

[#17]

Quoted:
Very neat idea. I'm sure guys with C-III AR's would be interested as well.

ETA: He's a member here.

http://www.ar15.com/forums/t_3_118/554275_Longziz__1__a_new_way_to_use_an_AR_lower_receiver.html&page=1

Thank you for posting that.

Posted: 11/28/2011 5:30:09 AM EDT

[#18]

intredasting...

Posted: 11/28/2011 5:30:56 AM EDT

[#19]

Quoted:
You guys are way behind the curve. He posted his story in the AR forum http://www.ar15.com/forums/t_3_118/554275_Longziz__1__a_new_way_to_use_an_AR_lower_receiver.html

Curiously, the mods locked the topic twice because he wasn't a paying industry partner. Guess they'd rather have threads about DD vs. BCM and 14.5" vs. 14.7", not innovative, fascinating new AR products.

I love this site, but there is something to be said for this, and I know it's not the first time it's happened

Posted: 11/28/2011 5:31:25 AM EDT

[#20]

Didn't Bushmaster make one of the ugly poor selling fuckers 15 years ago?

Posted: 11/28/2011 5:36:40 AM EDT

[#21]

I can see the value of all those lowers that have been mangled with broken trigger guard "ears" and such going up.

Posted: 11/28/2011 5:39:44 AM EDT

[#22]

Quoted:
Didn't Bushmaster make one of the ugly poor selling fuckers 15 years ago?

http://www.ozarkguns.com/Bushmaster/Bullpup/30-900-sa.jpg

They may be ugly but have you seen the prices on those lately? Kurt at KKM (RIP) did some fantastic things with that Bushmaster.

Posted: 11/28/2011 5:56:08 AM EDT

[#23]

Quoted:
Very neat idea. I'm sure guys with C-III AR's would be interested as well.

ETA: He's a member here.

http://www.ar15.com/forums/t_3_118/554275_Longziz__1__a_new_way_to_use_an_AR_lower_receiver.html&page=1

I came in here to post this...

I'm not real fond of bullpups... but I can appreciate his ability!

- Clint

Posted: 11/28/2011 6:03:29 AM EDT

[#24]

As a lefty, I would be very interested in an ambi bullpup.

Nice work.

Posted: 11/28/2011 6:11:30 AM EDT

[#25]

I was never a bullpup fan, but this looks cool.

Posted: 11/28/2011 6:23:07 AM EDT

[#26]

Quoted:

Quoted:
Didn't Bushmaster make one of the ugly poor selling fuckers 15 years ago?

http://www.ozarkguns.com/Bushmaster/Bullpup/30-900-sa.jpg

They may be ugly but have you seen the prices on those lately? Kurt at KKM (RIP) did some fantastic things with that Bushmaster.

I remember they were so hated and poor selling they got into the high $400s. Who would have thought to invest in those heavy turds.

Posted: 11/28/2011 6:54:18 AM EDT

[#27]

Quoted:

Quoted:
Didn't Bushmaster make one of the ugly poor selling fuckers 15 years ago?

http://www.ozarkguns.com/Bushmaster/Bullpup/30-900-sa.jpg

They may be ugly but have you seen the prices on those lately? Kurt at KKM (RIP) did some fantastic things with that Bushmaster.

I remember they were so hated and poor selling they got into the high $400s. Who would have thought to invest in those heavy turds.

The M17 didn't use a drop in AR15 lower reciever. What I find interesting about this concept is that a lower could be dropped in the bullpup frame, mate an upper to it and you have a new bullpup rifle.

The young man who is designing and building this has a PHD from an American university. We should be stapling a green card to that PHD and encourage these bright young folks to stay in the US.

Posted: 11/28/2011 7:01:41 AM EDT

[#28]

Posted: 11/28/2011 7:34:00 AM EDT

[#29]

Posted: 11/28/2011 7:36:09 AM EDT

[#30]

Posted: 11/28/2011 7:48:18 AM EDT

[#31]

I wanna see this thing firing

Posted: 11/28/2011 8:04:38 AM EDT

[#32]

KABOOM's are the only thing that worries me about bullpups. I would want to see an intentionally KABOOM'd rifle to demonstrate that catastrophic failure won't take my face off. On a normal rifle it's a "holy shit" situation but if the KABOOM below happened on a bullpup it would be new face time.

Posted: 11/28/2011 8:12:00 AM EDT

[#33]

Maybe he can sell it to Bushmaster so they fuck that up too.

Posted: 11/28/2011 8:16:35 AM EDT

[#34]

I kinda want one.

Posted: 11/28/2011 8:34:07 AM EDT

[#35]

Quoted:
I wanna see this thing firing

This........it is relevant to my interests I want a bullpup and am leaning towards a kel-tek

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Posted: 11/28/2011 8:34:53 AM EDT

[#36]

Do want

Posted: 11/28/2011 8:36:12 AM EDT

[#37]

Sexy, very sexy.

Posted: 11/28/2011 8:43:20 AM EDT

[#38]

I know that he just recently posted about this but has anyone seen a timeline as far as having these available for sale? I know that it will probably be a while before we ever see these hit the market. I like the idea.

Posted: 11/28/2011 8:43:42 AM EDT

[#39]

Quoted:

I kinda want one.

Posted: 11/28/2011 8:45:58 AM EDT

[#40]

Well thought out design using the AR15 lower as the "firearm." I would certainly like to see one in person. Any guesses on the overall length? If it were right at 26" with a 16" barrel, that would be a great non-SBR CQB choice.

Posted: 11/28/2011 9:17:20 AM EDT

[#41]

I would be interested in one if he could keep the conversion kit in the 500 to 700 range. It's a cool idea. Also where does it eject brass?

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Posted: 11/28/2011 9:23:08 AM EDT

[#42]

Would a cut out window in the over frame be required to display the AR lower reciever's serial number?

Posted: 11/28/2011 9:31:40 AM EDT

[#43]

In the vid, he says the one pictured has a 20" barrel, so imagine what 16" would look like! Being a southpaw, I really appreciate how easy it is to switch ejection sides.

Posted: 11/28/2011 9:32:17 AM EDT

[#44]

I like it.

Posted: 11/28/2011 9:37:56 AM EDT

[#45]

That's awesome.

Posted: 11/28/2011 9:40:22 AM EDT

[#46]

Quoted:

Posted: 11/28/2011 9:43:23 AM EDT

[#47]

Looks interesting but things like this have been done before and they always sucked. This guy seems pretty smart so, if he can work out all of the bugs inherent in such a design I think he'll have plenty of sales. I dig the ejection system, though.

Posted: 11/28/2011 9:58:23 AM EDT

[#48]

Quoted:

Quoted:

Didn't Bushmaster make one of the ugly poor selling fuckers 15 years ago?

http://www.ozarkguns.com/Bushmaster/Bullpup/30-900-sa.jpg

They may be ugly but have you seen the prices on those lately? Kurt at KKM (RIP) did some fantastic things with that Bushmaster.

I remember they were so hated and poor selling they got into the high $400s. Who would have thought to invest in those heavy turds.

The M17 didn't use a drop in AR15 lower reciever. What I find interesting about this concept is that a lower could be dropped in the bullpup frame, mate an upper to it and you have a new bullpup rifle.

The young man who is designing and building this has a PHD from an American university. We should be stapling a green card to that PHD and encourage these bright young folks to stay in the US.

We're to busy getting Paco to stay here and mow my fucking lawn.