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Posted: 4/7/2016 10:59:44 AM EDT
The airsoft M203 I bought on ebay for $65 shipped. The included trigger housing will not work at striking a primer so I made a new one. I'll post some photos of the trigger group when I'm finished milling the new design.
Here is the airsoft trigger group. I've milled out a 4140 steel safety to go with my new group, and will likely mill out a stronger trigger guard.

My first prototype has a 10gauge barrel (made on a lathe by a fellow arfcommer) that is permanently inserted into the airsoft barrel. My next ones will likely be 12gauge as I can find longer slit wads for 12gauge that can hold more shot and get better patterns.
I'm currently shooting 14 00buckshot through the 10gauge without any issue or damage to the airsoft m203. It's a very powerful scatter gun and throws a pattern as large as the pictured swing-set frame at 50yd. Inside of 25yd it puts most of the shot on the silhouette.
When I first started shooting it, It was very much like a yard cannon lol. I didn't take any chances working up my loads.

After getting my loads worked up I layered up for some more test shots.

4/12/16 Some new photos



I've been carried away with safety, I've built quite a few trigger groups, the latest one designed to prevent slam fire in case the firing pin were to become stuck forward and the primed barrel assembly were to slide down hard on it.



Also can be seen in the current 10gauge barrel.








Update 9/24/16 on Page 3




















 
 
 
 
 
 
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Link Posted: 4/7/2016 11:04:37 AM EDT
[#1]



What happens when you pack with it flachettes??
Link Posted: 4/7/2016 11:15:52 AM EDT
[#2]
I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless
Link Posted: 4/7/2016 11:21:53 AM EDT
[#3]
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Quoted:
I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless
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Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.
Link Posted: 4/7/2016 11:32:38 AM EDT
[#4]
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Quoted:


Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.
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Quoted:
Quoted:
I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless


Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.


18 U.S. Code § 921 - Definitions
    (a)  As used in this chapter—
         (5)   The term “shotgun” means a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger.
         (6)   The term “short-barreled shotgun” means a shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun (whether by alteration, modification or otherwise) if such a weapon as modified has an overall length of less than twenty-six inches.
(16)  The term “antique firearm” means—
(A)   any firearm (including any firearm with a matchlock, flintlock, percussion cap, or similar type of ignition system) manufactured in or before 1898; or
(B)  any replica of any firearm described in subparagraph (A) if such replica—
(i)   is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition, or
(ii)   uses rimfire or conventional centerfire fixed ammunition which is no longer manufactured in the United States and which is not readily available in the ordinary channels of commercial trade; or
(C)   any muzzle loading rifle, muzzle loading shotgun, or muzzle loading pistol, which is designed to use black powder, or a black powder substitute, and which cannot use fixed ammunition. For purposes of this subparagraph, the term “antique firearm” shall not include any weapon which incorporates a firearm frame or receiver, any firearm which is converted into a muzzle loading weapon, or any muzzle loading weapon which can be readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof.
Link Posted: 4/7/2016 11:33:16 AM EDT
[#5]
No Federal law against it and considering OP is in LA I doubt there is a problem at the state level either
Link Posted: 4/7/2016 11:37:25 AM EDT
[#6]




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Quoted:
Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.
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Quoted:
Quoted:




I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless

Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.
Straight from the atf page, they even provide an illustration that reducing the barrel length does not matter for antique/primitive ignition systems that black powder muzzle loaders fall under. My firing mechanism is not capable of shooting cased ammo even if one got a real barrel to fit as it is cocked by a plunger that would protrude into any real cases and it cannot be cocked otherwise.



















In addition #209 Shotgun primers now fall into the antique category if the barrel cannot be swapped out to fire conventional rounds.

"Many modern in-line muzzleloaders including those

that use #209 shotgun primers for ignition now meet

the definition of "antique firearm” and are excluded

from the provisions of the GCA."



 
 
Link Posted: 4/7/2016 11:37:42 AM EDT
[#7]
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Quoted:


Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.
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Quoted:
Quoted:
I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless


Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.


Ignore me............

My understanding, it depends on the action and whether primers or caps are utilized.
Modern muzzle loaders using inline primers to ignite the charge are subject to NFA regs. Primers are not historical whereas the historical style caps are.
If the firearm uses modern copy of an antique design firing system, then no.
http://www.atf.gov/publications/download/qb/atf-quarterly-bulletin-1998-volume-3.html#muzzle


Link Posted: 4/7/2016 11:39:24 AM EDT
[#8]
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Quoted:


18 U.S. Code § 921 - Definitions
    (a)  As used in this chapter—
         (5)   The term “shotgun” means a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger.
         (6)   The term “short-barreled shotgun” means a shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun (whether by alteration, modification or otherwise) if such a weapon as modified has an overall length of less than twenty-six inches.
(16)  The term “antique firearm” means—
(A)   any firearm (including any firearm with a matchlock, flintlock, percussion cap, or similar type of ignition system) manufactured in or before 1898; or
(B)  any replica of any firearm described in subparagraph (A) if such replica—
(i)   is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition, or
(ii)   uses rimfire or conventional centerfire fixed ammunition which is no longer manufactured in the United States and which is not readily available in the ordinary channels of commercial trade; or
(C)   any muzzle loading rifle, muzzle loading shotgun, or muzzle loading pistol, which is designed to use black powder, or a black powder substitute, and which cannot use fixed ammunition. For purposes of this subparagraph, the term “antique firearm” shall not include any weapon which incorporates a firearm frame or receiver, any firearm which is converted into a muzzle loading weapon, or any muzzle loading weapon which can be readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof.
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Quoted:
Quoted:
Quoted:
I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless


Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.


18 U.S. Code § 921 - Definitions
    (a)  As used in this chapter—
         (5)   The term “shotgun” means a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger.
         (6)   The term “short-barreled shotgun” means a shotgun having one or more barrels less than eighteen inches in length and any weapon made from a shotgun (whether by alteration, modification or otherwise) if such a weapon as modified has an overall length of less than twenty-six inches.
(16)  The term “antique firearm” means—
(A)   any firearm (including any firearm with a matchlock, flintlock, percussion cap, or similar type of ignition system) manufactured in or before 1898; or
(B)  any replica of any firearm described in subparagraph (A) if such replica—
(i)   is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition, or
(ii)   uses rimfire or conventional centerfire fixed ammunition which is no longer manufactured in the United States and which is not readily available in the ordinary channels of commercial trade; or
(C)   any muzzle loading rifle, muzzle loading shotgun, or muzzle loading pistol, which is designed to use black powder, or a black powder substitute, and which cannot use fixed ammunition. For purposes of this subparagraph, the term “antique firearm” shall not include any weapon which incorporates a firearm frame or receiver, any firearm which is converted into a muzzle loading weapon, or any muzzle loading weapon which can be readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof.


Anything loaded from the muzzle using black powder that cannot take fixed ammunition meets the definition of “antique firearm” in 18 U.S. Code § 921
Link Posted: 4/7/2016 11:58:40 AM EDT
[#9]


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Quoted:
My understanding, it depends on the action and whether primers or caps are utilized.


Modern muzzle loaders using inline primers to ignite the charge are subject to NFA regs. Primers are not historical whereas the historical style caps are.


If the firearm uses modern copy of an antique design firing system, then no.


http://www.atf.gov/publications/download/qb/atf-quarterly-bulletin-1998-volume-3.html#muzzle





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Quoted:





Quoted:




Quoted:


I hope you have a form 1 for that short-barreled shotgun.  Nice work nevertheless






Are MUZZLE LOADERS considered short barreled shotguns?  I seem to recall seeing a double barreled coach muzzle loaded short shotgun advertised by a national company as not needing paperwork.






My understanding, it depends on the action and whether primers or caps are utilized.


Modern muzzle loaders using inline primers to ignite the charge are subject to NFA regs. Primers are not historical whereas the historical style caps are.


If the firearm uses modern copy of an antique design firing system, then no.


http://www.atf.gov/publications/download/qb/atf-quarterly-bulletin-1998-volume-3.html#muzzle





Your quoting from 1998 you need to read the new stuff. Search #209 in the below document.


https://www.atf.gov/firearms/docs/federal-firearms-licensees-newsletter-february-2005/download







 
 
Link Posted: 4/7/2016 12:01:01 PM EDT
[#10]
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.
Link Posted: 4/7/2016 12:21:35 PM EDT
[#11]
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Quoted:
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.
View Quote


LOL!  Hey, I for one am impressed.  Looks like fun!
Link Posted: 4/7/2016 12:23:47 PM EDT
[#12]
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Quoted:
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.
View Quote


My thoughts..
Link Posted: 4/7/2016 12:27:39 PM EDT
[#13]


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Quoted:




What happens when you pack with it flachettes??
View Quote



Been too cheap to buy any, but it's been rooting around in my mind for a few months.

Looks like I can get nearly 1000 for $30 shipped

That's cheaper than buckshot lol.




 
 
Link Posted: 4/7/2016 12:39:48 PM EDT
[#14]
That's an awesome turkey gun.  Good for reenactments as well.
Link Posted: 4/7/2016 1:10:44 PM EDT
[#15]
That is the most awesome thing I've seen all day!
Any pics of the barrel insert?
Link Posted: 4/7/2016 1:55:33 PM EDT
[#16]
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Quoted:
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.
View Quote


Soak it up, hell, I want to do one.
If it's legal, it's a necessity in my "No Destructive Devices" state.
Now moving over to Ebay to begin shopping.
Link Posted: 4/7/2016 2:18:54 PM EDT
[#17]

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Quoted:


That's an awesome turkey gun.  Good for reenactments as well.
View Quote
I do a lot of squirrel and rabbit hunting in the thick woods. I've been using .22lr conversions for years in my AR rifles for small game and carrying a .44 super Blackhawk in case of deer. This will let me take any small game or deer using .22lr and buckshot or 5.56 and squirrel shot depending on what I find works best and what seasons are open.

 
Link Posted: 4/7/2016 2:46:23 PM EDT
[#18]

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Quoted:
Soak it up, hell, I want to do one.

If it's legal, it's a necessity in my "No Destructive Devices" state.

Now moving over to Ebay to begin shopping.

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Quoted:



Quoted:

Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.




Soak it up, hell, I want to do one.

If it's legal, it's a necessity in my "No Destructive Devices" state.

Now moving over to Ebay to begin shopping.

Heck ya, I may do the same thing. Muzzle loading 203 golf ball chucker in the future.
Link Posted: 4/7/2016 2:55:15 PM EDT
[#19]
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Quoted:
Heck ya, I may do the same thing. Muzzle loading 203 golf ball chucker in the future.
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Quoted:
Quoted:
Quoted:
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.


Soak it up, hell, I want to do one.
If it's legal, it's a necessity in my "No Destructive Devices" state.
Now moving over to Ebay to begin shopping.
Heck ya, I may do the same thing. Muzzle loading 203 golf ball chucker in the future.




Golf ball launchers are stupid fun
Link Posted: 4/7/2016 3:53:10 PM EDT
[#20]

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Quoted:



Quoted:


Quoted:


Quoted:

Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.




Soak it up, hell, I want to do one.

If it's legal, it's a necessity in my "No Destructive Devices" state.

Now moving over to Ebay to begin shopping.

Heck ya, I may do the same thing. Muzzle loading 203 golf ball chucker in the future.




http://i6.photobucket.com/albums/y236/Iron_Airship/golfballlauncher.jpg



Golf ball launchers are stupid fun
Looks like a live round was used lol.



 
Link Posted: 4/7/2016 3:54:06 PM EDT
[#21]
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Quoted:
Looks like a live round was used lol.
 
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Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
Can't you legal people just take a moment to soak in the awesomeness of my creation? You've got no worries so why not enjoy some American ingenuity.


Soak it up, hell, I want to do one.
If it's legal, it's a necessity in my "No Destructive Devices" state.
Now moving over to Ebay to begin shopping.
Heck ya, I may do the same thing. Muzzle loading 203 golf ball chucker in the future.


http://i6.photobucket.com/albums/y236/Iron_Airship/golfballlauncher.jpg

Golf ball launchers are stupid fun
Looks like a live round was used lol.
 

blanks
Link Posted: 4/7/2016 4:00:31 PM EDT
[#22]
Suddenly I have a new want. Nice work, OP.
Link Posted: 4/7/2016 4:01:36 PM EDT
[#23]




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Looks like a live round was used lol.




 





blanks





The little black dot on the ball looks like what golf balls look like after being shot. I assume live rounds would work just fine at launching one, is there a safety concern to the shooter or firearm if a live round was used and there was nothing to worry about down range?






 


 
Link Posted: 4/7/2016 4:04:46 PM EDT
[#24]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

The little black dot on the ball looks like what golf balls look like after being shot. I assume live rounds would work just fine at launching one, is there a safety concern to the shooter or firearm if a live round was used and there was nothing to worry about down range?
   
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Quoted:
Quoted:
Looks like a live round was used lol.
 

blanks

The little black dot on the ball looks like what golf balls look like after being shot. I assume live rounds would work just fine at launching one, is there a safety concern to the shooter or firearm if a live round was used and there was nothing to worry about down range?
   


I would assume live rounds would explode the barrel
Link Posted: 4/7/2016 4:04:56 PM EDT
[#25]

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Quoted:


That is the most awesome thing I've seen all day!

Any pics of the barrel insert?
View Quote
I'll be posting more photos as I pull newly modified parts off the mill.



 
Link Posted: 4/7/2016 5:08:08 PM EDT
[#26]
I love my golf ball launcher too! I need more room like you though, KKID, I am all woods here.



Cant wait to see the fresh parts!
Link Posted: 4/8/2016 1:17:03 AM EDT
[#27]
Can't wait to see the new pics.
I absolutely love this type of stuff!

Oooooh.....Just had an idea!

Link Posted: 4/8/2016 6:12:19 AM EDT
[#28]
Awesomeness level of this thread: Eleven.

Link Posted: 4/8/2016 1:15:10 PM EDT
[#29]

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Quoted:


Can't wait to see the new pics.

I absolutely love this type of stuff!



Oooooh.....Just had an idea!



http://az321826.vo.msecnd.net/6296bc8112c245309be1258f3a08eb6a/Images/Products4220-1200x800-93618.jpg
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Buy me one and I'll convert it for the both of us lol

 
Link Posted: 4/12/2016 5:08:24 PM EDT
[#30]
Updated with some new photos in the OP.

Just when I thought I was satisfied with my current firing mechanism I've already come up with some new ideas . This project has become a monster.
Link Posted: 4/12/2016 6:52:03 PM EDT
[#31]
This entire thread has a real "hey y'all, watch this; somebody hold my beer"! feel to it.  As someone who escaped the East Coast for rural Alabama at age 16 -- I can relate.
Link Posted: 4/12/2016 8:16:52 PM EDT
[#32]


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Quoted:



This entire thread has a real "hey y'all, watch this; somebody hold my beer"! feel to it.  As someone who escaped the East Coast for rural Alabama at age 16 -- I can relate.
View Quote
Your lack of faith is disturbing.



 
Link Posted: 4/13/2016 6:42:38 PM EDT
[#33]
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Quoted:
Your lack of faith is disturbing.  
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Quoted:
Quoted:
This entire thread has a real "hey y'all, watch this; somebody hold my beer"! feel to it.  As someone who escaped the East Coast for rural Alabama at age 16 -- I can relate.
Your lack of faith is disturbing.  


No, no, you misunderstand me.  I am all in!
Link Posted: 4/13/2016 8:05:07 PM EDT
[#34]
Discussion ForumsJump to Quoted PostQuote History
Quoted:


No, no, you misunderstand me.  I am all in!
View Quote View All Quotes
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
This entire thread has a real "hey y'all, watch this; somebody hold my beer"! feel to it.  As someone who escaped the East Coast for rural Alabama at age 16 -- I can relate.
Your lack of faith is disturbing.  


No, no, you misunderstand me.  I am all in!



Hold my beer. Redneck for, "It's my turn to play."
Link Posted: 4/13/2016 9:21:09 PM EDT
[#35]
Right now I'm working on a new trigger group and working on the math for ballistic performance.



I'd like to be able to get similar ballistic performance from a rifled 12gauge barrel as a desert eagle loaded with .50ae

200gr+ projectile at 1500fps is my goal for shots out to 150yd, but still looking into it.
Link Posted: 4/14/2016 1:26:22 PM EDT
[#36]
By far one of the most interesting threads ive seen on this forum..

A blooper would be fun as all get out built like this..
Link Posted: 4/27/2016 7:02:10 AM EDT
[#37]
Update: 4/27/16

My barrel blanks must are being held hostage. Still no shipping notice.



Meanwhile I've been thinking ahead and feel that he best direction for the firing mechanism is to make it compatible with all airsoft 40mm launchers. That means the M79 and scar launchers .etc



The new mechanism fits inside a 40mm shell and ejects after each shot. It doesn't contain the primer or anything that would make into a cartridge it is purely mechanical.

The only downside is that the usable barrel length is reduced by up to 2". That means with the m203 the actual usable barrel may be 8"- 10" long. The plus side is not having to come up with a unique mechanism for every available airsoft launcher.



I can return to the hold mechanism if 37mm barrels ever become available.
Link Posted: 4/27/2016 9:04:37 AM EDT
[#38]
Tech-Com,

Do you think the all metal airsoft M203's are robust enough for the 37mm shells that are available on the market?
I was wondering if it would be possible to turn one of the barrels to remove the fake rifling and have a 37mm sleeve made and inserted.
I know we're talking a sleeve with a wall thickness of only 1.5mm.
Just thinking out loud.
Link Posted: 4/29/2016 4:34:37 AM EDT
[#39]
Had some questions about authentic M203 handguards and the airsoft ones. So here is a quick guide to help distinguish them.













 
Link Posted: 5/27/2016 11:54:52 PM EDT
[#40]
That m203 muzzle loader made me smile!
Link Posted: 6/16/2016 1:36:25 AM EDT
[#41]
Whose ready for another update?
Link Posted: 6/16/2016 5:47:57 AM EDT
[#42]
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Quoted:
Whose ready for another update?
View Quote



Link Posted: 6/16/2016 6:43:56 AM EDT
[#43]
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Quoted:



View Quote View All Quotes
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Whose ready for another update?





Link Posted: 6/16/2016 6:54:29 AM EDT
[#44]
The numbers on the M203 handguard are not the serial number. The first is the part number/drawing number. The second number is the CAGE (Commercial and Government Entity) code which ids the manufacturer which is Precision Standard, Ferndale, MI.

--fjruple
Link Posted: 6/16/2016 10:53:49 AM EDT
[#45]

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Quoted:


The numbers on the M203 handguard are not the serial number. The first is the part number/drawing number. The second number is the CAGE (Commercial and Government Entity) code which ids the manufacturer which is Precision Standard, Ferndale, MI.



--fjruple
View Quote
I knew this so I'm not even sure why I wrote serial on the drawings lol
Link Posted: 6/16/2016 12:26:41 PM EDT
[#46]
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Quoted:
Whose ready for another update?
View Quote


Waiting ever so impatiently
Link Posted: 6/16/2016 1:07:21 PM EDT
[#47]
No video??
Link Posted: 6/17/2016 11:54:55 AM EDT
[#48]

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Quoted:


No video??
View Quote
Here's an older video




 
Link Posted: 6/17/2016 11:31:32 PM EDT
[#49]
This isn't my planned update, I might need another day to get that ready, but I can show off some of the buckshot options using available wads.

I believe #2 will be my preferred choice since it stacks uniform in the wad and will perform better at longer ranges.

00buckshot has been working just fine but you can't throw as much lead downrange when using a wad as you can with slightly smaller shot.




Link Posted: 6/18/2016 12:44:36 AM EDT
[#50]
While y'all on the next update I thought I'd share my trigger design.





For me safety comes before everything else in this project and I knew there were just too many variables to trust the homemade fire control groups I've designed. I redesigned the fire-control group around a slightly modified ar15 hammer and trigger. This ensures the contact surfaces are milspec hardened and safety will not be compromised with prolonged use.
The mechanism cocks by moving the barrel forward and then backwards very similar to the real m203. The real m203 is cocked on the forward motion, mine the backward motion.





The firing pin is spring loaded to prevent slamfires.
I've ordered some aluminum stock to make a prototype 37mm barrel.





 
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