Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
Basic
Offline
  • Joined Jul 2011
  • Posts 1
  • EE 0% (0)
USA FL, USA
Posted: 12/23/2011 3:53:14 PM EST
I want to build/ order parts to build a 5 pound M4 in .556.

Has anyone here built one from parts, that I could copy?

Thank You!

30 caliber junkie
Avatar
Bronze
Offline
  • Joined Nov 2008
  • Posts 1610
  • EE 100% (80)
USA KY, USA
Link Posted: 12/23/2011 4:07:24 PM EST
You'll be close, with the Robb Jensen 5.86lb gun. Barrel profile is .560 midlength with a Troy TRX 13, a pinned muzzle device, A5 RE, Aimpoint Micro, Daniel Defense fixed sights, JP Low mass carrier, and TLR-3.

You'd pickup a half pound going sights only and no light, but this is a very reasonably equipped gun. Also there's no forward assist: only the plug.

Good luck.

Posted Via AR15.Com Mobile
Ever notice the sound of a gun being charged is the universal language of dominance?

God bless America.
Basic
Offline
  • Joined Jul 2011
  • Posts 2
  • EE 0% (0)
USA FL, USA
Link Posted: 12/23/2011 4:13:23 PM EST
Sorry for being a total noob, with everything you just said. I can find via Google? Is this a prebuilt rifle?

Thanks

Basic
Offline
  • Joined Jun 2008
  • Posts 503
  • EE 100% (70)
USA WI, USA
Link Posted: 12/23/2011 4:15:56 PM EST
Don't remember the total weight but it was suppose to be around 5-6 lbs. I'm in the process of building one myself just so I can have one and not spend $1800 on it

linky

Basic
Offline
  • Joined Jul 2011
  • Posts 3
  • EE 0% (0)
USA FL, USA
Link Posted: 12/23/2011 4:19:23 PM EST
Do you have a parts list blaster ?


Originally Posted By blaster_54738:
Don't remember the total weight but it was suppose to be around 5-6 lbs. I'm in the process of building one myself just so I can have one and not spend $1800 on it

linky



Member
Avatar
Bronze
Offline
  • Joined Dec 2009
  • Posts 965
  • EE 100% (24)
USA LA, USA
Link Posted: 12/23/2011 4:48:37 PM EST
Take a look at a Colt 6720. You should be able to get close with a 14.5" pinned pencil barrel, slick-side flat-top upper, small BUIS like a MaTech, and light weight stock and hand guards. Maybe an ACE stock, and Clark Custom carbon fiber tube.

Basic
Offline
  • Joined Jun 2008
  • Posts 504
  • EE 100% (70)
USA WI, USA
Link Posted: 12/23/2011 5:05:45 PM EST
Originally Posted By OneShotSmackDown:
Do you have a parts list blaster ?


Originally Posted By blaster_54738:
Don't remember the total weight but it was suppose to be around 5-6 lbs. I'm in the process of building one myself just so I can have one and not spend $1800 on it

linky




Red Jacket has the list of what they used. Mine will be a Bushmaster lightweight barrel and Rainier arms NON foward assist upper. Will be using a DPMS carbon fiber free float instead of the one they have. Other than that not much difference.

Basic
Offline
  • Joined Nov 2007
  • Posts 101
  • EE 0% (0)
USA TX, USA
Link Posted: 12/23/2011 8:41:17 PM EST
Still trying to figure what this means on their list. Internal Parts: Mil-Spec internals. Good luck on your build.

Halliburton Posting Machine
Avatar
Bronze
Online
  • Joined Jan 2008
  • Posts 8458
  • EE 100% (1)
USA USA
Link Posted: 12/23/2011 8:49:45 PM EST
If I had to make a lightweight build, I'd probably:

1) consider a polymer Cav arms lower
2) If i went with aluminum, I'd put one of the new smaller magpul grips or say the troy ax grip on it. CTR stock.
3) lightweight profile barrel. 14.5in (carbine gas I guess), small low profile gas block. get a light muzzle device that's 1.5in long, have someone pin and weld for you.
4) troy TRX extreme rail, or say a clark custom carbon fiber tube. (idk if these can be cutdown?), but I would have that done to it if possible.
5) Slick side upper receiver, or at least one that lacks a forward assist. wasted weight.
6) I guess* I'd go with a non M-16 (ar-15 style) bolt carrier, though i don't know how much weight it would really save off the top of my head?

7) pick an optic. if you go with a troy TRX extreme rail, that might be MBUS. if you went with a clark and a gasblock that doesn't have a rail on it, consider an aimpoint T-1.

?

8) Profit


That's my best shot in the dark. check out the lightweight thread!
Lots of good ideas in there

http://www.ar15.com/forums/t_3_118/527546_Lightweight_AR_Picture_Thread.html
Originally Posted By Primorsky:
"Tu-95 is typical ww2-style looking war machine. Have you ever seen Mig-29/Su-27/T-50? They are sex in skies, and it's not only my opinion. People like their shapes."
30 caliber junkie
Avatar
Bronze
Offline
  • Joined Nov 2008
  • Posts 1611
  • EE 100% (80)
USA KY, USA
Link Posted: 12/23/2011 9:18:55 PM EST
Here's the link. You'll find an evolution for the parts going from MBUS to DD fixed but mostly it comes down to barrel profile, the TRX, and Micro. The only 'heavy' object in the gun would be, imho, the Vltor A5 system. But the benefit is there for a controllable gun.
Ever notice the sound of a gun being charged is the universal language of dominance?

God bless America.
Swimming in a fishbowl
Avatar
Bronze
Offline
  • Joined Jun 2006
  • Posts 4996
  • EE 100% (18)
USA LA, USA
Link Posted: 12/23/2011 9:57:59 PM EST
Originally Posted By Foxnews_FTW:
If I had to make a lightweight build, I'd probably:

1) consider a polymer Cav arms lower
2) If i went with aluminum, I'd put one of the new smaller magpul grips or say the troy ax grip on it. CTR stock.
3) lightweight profile barrel. 14.5in (carbine gas I guess), small low profile gas block. get a light muzzle device that's 1.5in long, have someone pin and weld for you.
4) troy TRX extreme rail, or say a clark custom carbon fiber tube. (idk if these can be cutdown?), but I would have that done to it if possible.
5) Slick side upper receiver, or at least one that lacks a forward assist. wasted weight.
6) I guess* I'd go with a non M-16 (ar-15 style) bolt carrier, though i don't know how much weight it would really save off the top of my head? Young Mfg NM light weight carrier
(There are lighter weight options, but they are way spendy)
7) pick an optic. if you go with a troy TRX extreme rail, that might be MBUS. if you went with a clark and a gasblock that doesn't have a rail on it, consider an aimpoint T-1.

?

8) Profit


That's my best shot in the dark. check out the lightweight thread!
Lots of good ideas in there

http://www.ar15.com/forums/t_3_118/527546_Lightweight_AR_Picture_Thread.html


Never argue with an idiot. They will drag you down to their level and beat you with experience.

Before you judge someone, walk a mile in their shoes...
That way, when you do judge them, you will be a mile away, and they will have no shoes.
Halliburton Posting Machine
Avatar
Bronze
Online
  • Joined Jan 2008
  • Posts 8459
  • EE 100% (1)
USA USA
Link Posted: 12/23/2011 10:18:49 PM EST
Originally Posted By LMTRocks:
Here's the link. You'll find an evolution for the parts going from MBUS to DD fixed but mostly it comes down to barrel profile, the TRX, and Micro. The only 'heavy' object in the gun would be, imho, the Vltor A5 system. But the benefit is there for a controllable gun.


This.

Actually, OP: Whats your goal? A carbine course ready gun that's light? SHTF/HD/Zombies/Redcoats ready? or lightweight at any cost?

Give us more clues, that way the posters here can help
Originally Posted By Primorsky:
"Tu-95 is typical ww2-style looking war machine. Have you ever seen Mig-29/Su-27/T-50? They are sex in skies, and it's not only my opinion. People like their shapes."
Basic
Offline
  • Joined Jul 2011
  • Posts 4
  • EE 0% (0)
USA FL, USA
Link Posted: 12/24/2011 5:21:02 AM EST
Well why I want a 5pd AR is because I'm a disabled shooter/hunter. I'm a high level quad, limited arm movement. Feel free to ask anything else, it doesn't bother me to talk about it.

30 caliber junkie
Avatar
Bronze
Offline
  • Joined Nov 2008
  • Posts 1615
  • EE 100% (80)
USA KY, USA
Link Posted: 12/24/2011 9:12:46 AM EST
[Last Edit: 12/24/2011 9:17:26 AM EST by LMTRocks]
If I were running a 5lb gun:
14.5" carbine running a contour to .570 fore and aft of the gas block
FSB profiled and cut to use rear taper pin
Troy 9" TRX Extreme
H2 or H3 buffer
Rainier slickside upper
no port door or hardware
Aimpoint Micro on DD 1/3 mount
no BUIS
no light
no VFG
A1 pistol grip
MOE triggerguard (polymer)
CAR stock

This whole "light is right and every ounce counts" and "ounces equal pounds and pounds equal pain" mentality is starting to catch on. My SBR is going to get the barrel contoured down to .700 since it's a 30cal and that will leave enough wall thickness similar to a Colt pencil 5.56 barrel. I've read some people going to .650 for 30cal bores, but I'm certain losing a bit of metal around under the gas system will do me just fine.

If I was truly weight concious I'd drop the SOPMOD stock, but I can't bring myself to do that

Even my RVG went to the chopping block and I might dimple it a little bit just to see if i can shave off another 1/4 ounce

Good luck OP––-hope this helps your quest sir.

Edit to add: an SBR stamp on your chosen lower. I hate pinned muzzle devices.
Ever notice the sound of a gun being charged is the universal language of dominance?

God bless America.
Basic
Offline
  • Joined Aug 2008
  • Posts 1271
  • EE 100% (24)
USA OK, USA
Link Posted: 12/25/2011 1:21:09 AM EST
do you want a 5 pound AR, or a 5 pound M-4?
M-4's can't be M-4's without a M-4 barrel.
M-4 barrels are .750" (at least) except for the .625" cut to hang the M203 grenade launcher.
you SAID M-4, did you mean any AR?

Member
Avatar
Bronze
Offline
  • Joined Jan 2001
  • Posts 2638
  • EE 0% (0)
USA USA
Link Posted: 12/25/2011 11:33:11 AM EST
A 5 pound AR is a nice number to shoot for, but at a certain point, you get into exotic, non-standard parts to make that number reality... possibly at the cost of reliability.

16" Bushmaster SuperLight Barrel Assembly would be a great starting point. Great barrel and about as light as you can go without asking the BATF permission to build a Short Barreled Rifle.

M16 (slick side) or A1 / C7 upper. If your disability rules out using iron sights, then flattop/red dot would be the way to go.

BCM bolt carrier group

CAR stock http://www.mapartsinc.com/productsDetail.asp?id=1073

This used to have the Bushmaster Superlight barrel... went the SBR route and it now has an 11.5" Colt lightweight barrel.
http://www.youtube.com/watch?v=br_fcjb44t0
Basic
Offline
  • Joined Jul 2011
  • Posts 5
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:19:46 PM EST
Yes, AR -in .556 ? Is that correct? My knowledge isn't good on the black guns. I know I want a light .556 cal - due to my arm strength.

Originally Posted By hotdog250j:
do you want a 5 pound AR, or a 5 pound M-4?
M-4's can't be M-4's without a M-4 barrel.
M-4 barrels are .750" (at least) except for the .625" cut to hang the M203 grenade launcher.
you SAID M-4, did you mean any AR?



Basic
Offline
  • Joined Jul 2011
  • Posts 6
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:24:14 PM EST
lol yes zombies! :) I just want one, no reason.


Originally Posted By Foxnews_FTW:
Originally Posted By LMTRocks:
Here's the link. You'll find an evolution for the parts going from MBUS to DD fixed but mostly it comes down to barrel profile, the TRX, and Micro. The only 'heavy' object in the gun would be, imho, the Vltor A5 system. But the benefit is there for a controllable gun.


This.

Actually, OP: Whats your goal? A carbine course ready gun that's light? SHTF/HD/Zombies/Redcoats ready? or lightweight at any cost?

Give us more clues, that way the posters here can help



Basic
Offline
  • Joined Jul 2011
  • Posts 7
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:26:14 PM EST

Thanks for the info!

Originally Posted By LMTRocks:
If I were running a 5lb gun:
14.5" carbine running a contour to .570 fore and aft of the gas block
FSB profiled and cut to use rear taper pin
Troy 9" TRX Extreme
H2 or H3 buffer
Rainier slickside upper
no port door or hardware
Aimpoint Micro on DD 1/3 mount
no BUIS
no light
no VFG
A1 pistol grip
MOE triggerguard (polymer)
CAR stock

This whole "light is right and every ounce counts" and "ounces equal pounds and pounds equal pain" mentality is starting to catch on. My SBR is going to get the barrel contoured down to .700 since it's a 30cal and that will leave enough wall thickness similar to a Colt pencil 5.56 barrel. I've read some people going to .650 for 30cal bores, but I'm certain losing a bit of metal around under the gas system will do me just fine.

If I was truly weight concious I'd drop the SOPMOD stock, but I can't bring myself to do that

Even my RVG went to the chopping block and I might dimple it a little bit just to see if i can shave off another 1/4 ounce

Good luck OP––-hope this helps your quest sir.

Edit to add: an SBR stamp on your chosen lower. I hate pinned muzzle devices.



Basic
Offline
  • Joined Jul 2011
  • Posts 8
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:27:48 PM EST
Thank you :)


Originally Posted By LMTRocks:
Here's the link. You'll find an evolution for the parts going from MBUS to DD fixed but mostly it comes down to barrel profile, the TRX, and Micro. The only 'heavy' object in the gun would be, imho, the Vltor A5 system. But the benefit is there for a controllable gun.



Basic
Offline
  • Joined Jul 2011
  • Posts 9
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:33:23 PM EST
[Last Edit: 12/25/2011 12:53:27 PM EST by OneShotSmackDown]
exotic, doesn't bother me. Because why I need a 5 pound AR. I'd get more use out of it. I can roll in my chair to the nearest gun range. Yea I'd like a red dot scope.


Originally Posted By gregw45:
A 5 pound AR is a nice number to shoot for, but at a certain point, you get into exotic, non-standard parts to make that number reality... possibly at the cost of reliability.

16" Bushmaster SuperLight Barrel Assembly would be a great starting point. Great barrel and about as light as you can go without asking the BATF permission to build a Short Barreled Rifle.

M16 (slick side) or A1 / C7 upper. If your disability rules out using iron sights, then flattop/red dot would be the way to go.

BCM bolt carrier group

CAR stock http://www.mapartsinc.com/productsDetail.asp?id=1073

This used to have the Bushmaster Superlight barrel... went the SBR route and it now has an 11.5" Colt lightweight barrel.
http://i838.photobucket.com/albums/zz305/tz1998/shorty.jpg



Basic
Offline
  • Joined Jul 2011
  • Posts 10
  • EE 0% (0)
USA FL, USA
Link Posted: 12/25/2011 12:56:48 PM EST
[Last Edit: 12/25/2011 2:30:00 PM EST by OneShotSmackDown]
The 5 pound AR, where do you think I'd be on the price. If I order everything?

Also anyone have a parts check list to follow? I searched the forums...

I ran across this... 5.36 pds. I want it. Anyone have any info it's Robb Jensen - other than whats below?

Originally Posted By LMTRocks:
You'll be close, with the Robb Jensen 5.86lb gun. Barrel profile is .560 midlength with a Troy TRX 13, a pinned muzzle device, A5 RE, Aimpoint Micro, Daniel Defense fixed sights, JP Low mass carrier, and TLR-3.
Posted Via AR15.Com Mobile


http://img.photobucket.com/albums/v408/gotm4/Virginia%20Arms%20pics/ProjectFeatherweightApr142011.jpg

Top