Ultralight Ultralight Rifles

[C Bow]

Trackselk would you please share where you got carbon buffer tube Thanks

 

[KyleR1985]

I wish i would have done whatever you did cause that's 2.8 pounds less than my gasser, despite all the research on parts. Oh well. Mine is sitting at 6.3 pounds with swfa ul 2-10x33 on aero mounts.

I’m not the best resource. But:

TNA lower

A2 buffer tube
Farrow tech butt

NFA lower parts kit minus trigger
Geissele trigger

Troy industries upper from primary arms(a few other options same weight or less) but these are 30.00 right now.

Whatever lightweight charging handle

Law ARIC bcg

Pick your flavor of 6 ounce carbon hand guard and barrel nut

BCA pencil barrel

SA adjustable gas block

I’m sure I’m missing something. And I’m sure there’s a way to shave an ounce or 4. But this nets 3.5lbs.

 

[Trackselk]

Trackselk would you please share where you got carbon buffer tube ThThanks

Rc-wing.com
But, I would seriously look into how @packgoatguy did his, because boring out the farrowtech was a pain and made it weaker. On the other hand, the smaller diameter that he used might not be as good for a cheek weld, but it may be lighter than my 3.2oz combo. Here's the size I used, oh, I also had to shim the tube stub up a little and use thick glue. I used superglue gel as the shim, and E6000 which worked pretty well.

30mm O.D. 28mm I.D. 30x28x500mm 30mm 3K Roll Wrapped 100% Pure Round Carbon Tubes (2 PCS) × 1

 

[Trackselk]

I’m not the best resource. But:

TNA lower

A2 buffer tube
Farrow tech butt

NFA lower parts kit minus trigger
Geissele trigger

Troy industries upper from primary arms(a few other options same weight or less) but these are 30.00 right now.

Whatever lightweight charging handle

Law ARIC bcg

Pick your flavor of 6 ounce carbon hand guard and barrel nut

BCA pencil barrel

SA adjustable gas block

I’m sure I’m missing something. And I’m sure there’s a way to shave an ounce or 4. But this nets 3.5lbs.

You can shave about 2oz with 35x37mm carbon tube from Amazon, even more if you drilled a bunch of holes in it. Saves cash too.
*if you're using the Jag composites nut anyhow
*required 2 wraps of electrical tape front and rear of the nut as shims.

 

[ezwy]

@hereinaz would your hunter scoped action armor 12” be the right fit for one of these ulul ar builds with a 5 round magazine and a microprism? Or the ultralight SWFA?

 

[Hardly_Hangin]

If someone wanted to build a dedicated eastern whitetail gun (say max distance 200 yards) is there a reason im overlooking not to build a 10.5" barrel or similar pistol build? You should have 1800fps out to 300 yards which should be enough to expand most tipped bullets (based on calc for 223 73gr eldm at my altitude).

The slower velocities would actually give better penetration too, right? Lack of pass throughs seemed to be the biggest con i read in the 223 thread from whitetail hunters.

That would shave off a good bit of weight, and be a wieldy length with an 8" can.

Gasser, not bolt pull. Something approximating a mark18

 

[goalie]

If someone wanted to build a dedicated eastern whitetail gun (say max distance 200 yards) is there a reason im overlooking not to build a 10.5" barrel or similar pistol build? You should have 1800fps out to 300 yards which should be enough to expand most tipped bullets (based on calc for 223 73gr eldm at my altitude).

The slower velocities would actually give better penetration too, right? Lack of pass throughs seemed to be the biggest con i read in the 223 thread from whitetail hunters.

That would shave off a good bit of weight, and be a wieldy length with an 8" can.

Gasser, not bolt pull. Something approximating a mark18

My 12.5" worked very well up close. 12.5" gained significant velocity over 10.5" with heavier bullets.

 

[hereinaz]

@hereinaz would your hunter scoped action armor 12” be the right fit for one of these ulul ar builds with a 5 round magazine and a microprism? Or the ultralight SWFA?

The Hunter will fit around the action, with 5 round. It will not go around the grip. The tactical version will go around the grip too.

 

[packgoatguy]

If someone wanted to build a dedicated eastern whitetail gun (say max distance 200 yards) is there a reason im overlooking not to build a 10.5" barrel or similar pistol build? You should have 1800fps out to 300 yards which should be enough to expand most tipped bullets (based on calc for 223 73gr eldm at my altitude).

The slower velocities would actually give better penetration too, right? Lack of pass throughs seemed to be the biggest con i read in the 223 thread from whitetail hunters.

That would shave off a good bit of weight, and be a wieldy length with an 8" can.

Gasser, not bolt pull. Something approximating a mark18

For your analysis: I recently had a 5.56 BCA 16 inch pencil barrel cut down to 8 inches for my SBR. The barrel weighed 16.5oz before the cut and thread, and 10.7oz after. So that should give you a ballpark for how many ounces you'd lose going to a 10.5 inch barrel.

The 77tmk ammo I use does about 2750fps in a 16 inch barrel, and about 2230fps in the 8 inch barrel. That is enough velocity for the bullet velocity to stay above 1800fps to about 280 yards at my elevation. So, an 8 inch barrel would work well for a 200 yard gun. You will likely gain a couple hundred fps going from 8 to 10.5 if the extra velocity is needed.

 

[KyleR1985]

For your analysis: I recently had a 5.56 BCA 16 inch pencil barrel cut down to 8 inches for my SBR. The barrel weighed 16.5oz before the cut and thread, and 10.7oz after. So that should give you a ballpark for how many ounces you'd lose going to a 10.5 inch barrel.

The 77tmk ammo I use does about 2750fps in a 16 inch barrel, and about 2230fps in the 8 inch barrel. That is enough velocity for the bullet velocity to stay above 1800fps to about 280 yards at my elevation. So, an 8 inch barrel would work well for a 200 yard gun. You will likely gain a couple hundred fps going from 8 to 10.5 if the extra velocity is needed.

How did it shoot?

 

[hereinaz]

For your analysis: I recently had a 5.56 BCA 16 inch pencil barrel cut down to 8 inches for my SBR. The barrel weighed 16.5oz before the cut and thread, and 10.7oz after. So that should give you a ballpark for how many ounces you'd lose going to a 10.5 inch barrel.

The 77tmk ammo I use does about 2750fps in a 16 inch barrel, and about 2230fps in the 8 inch barrel. That is enough velocity for the bullet velocity to stay above 1800fps to about 280 yards at my elevation. So, an 8 inch barrel would work well for a 200 yard gun. You will likely gain a couple hundred fps going from 8 to 10.5 if the extra velocity is neede

You all are making me “need” a short barrel ULUL… I have a 14.5” barrel on my SBR now, but making a short straight pull upper is very tempting.

 

[packgoatguy]

Rc-wing.com
But, I would seriously look into how @packgoatguy did his, because boring out the farrowtech was a pain and made it weaker. On the other hand, the smaller diameter that he used might not be as good for a cheek weld, but it may be lighter than my 3.2oz combo. Here's the size I used, oh, I also had to shim the tube stub up a little and use thick glue. I used superglue gel as the shim, and E6000 which worked pretty well.

30mm O.D. 28mm I.D. 30x28x500mm 30mm 3K Roll Wrapped 100% Pure Round Carbon Tubes (2 PCS) × 1

I used a 25mm OD 23mm ID carbon tube that fits inside a rifle length buffertube. Built up the diameter a bit with superglue to make a tight fit if i want it removable, . Or just jb weld it in place for a permanent end piece.

 

[packgoatguy]

How did it shoot?

Well enough for a 200 yard rifle. My 100 yard groups were probably around an inch and a half, but I'm guessing it's as much a limitation of my eyes and the unmagnified red dot as it is the accuracy of the barrel. I was going to shoot more today, but woke to 20mph winds.

I have a pic of my 200 yard gong in post 2367, and discuss it a bit in 2360

 

[KyleR1985]

Well enough for a 200 yard rifle. My 100 yard groups were probably around an inch and a half, but I'm guessing it's as much a limitation of my eyes and the unmagnified red dot as it is the accuracy of the barrel. I was going to shoot more today, but woke to 20mph winds.

I have a pic of my 200 yard gong in post 2367, and discuss it a bit in 2360

Sorry. New baby.

Haha you were even responding to me. Thanks again.

I have a 12.5” 6ARC, and was thinking 10” on the .223. Both should easily get me to 300yd range by velocity. Assuming I can get em to shoot…

 

[Trackselk]

Well enough for a 200 yard rifle. My 100 yard groups were probably around an inch and a half, but I'm guessing it's as much a limitation of my eyes and the unmagnified red dot as it is the accuracy of the barrel. I was going to shoot more today, but woke to 20mph winds.

I have a pic of my 200 yard gong in post 2367, and discuss it a bit in 2360

Yeah, from what you posted I have no doubt that it's a 275-300 yard rifle with tmk's and the right optics (shooter ability dependent).

 

[packgoatguy]

Sorry. New baby.

Haha you were even responding to me. Thanks again.

I have a 12.5” 6ARC, and was thinking 10” on the .223. Both should easily get me to 300yd range by velocity. Assuming I can get em to shoot…

Congrats on the little one!

My math says a 10 inch barrel will get me about 2425fps with my ammo (stand1 77tmk). That gets it to 395 yards before it drops below 1800fps. 260 yards for 2000fps.

 

[KyleR1985]

Congrats on the little one!

My math says a 10 inch barrel will get me about 2425fps with my ammo (stand1 77tmk). That gets it to 395 yards before it drops below 1800fps. 260 yards for 2000fps.

I had single feed 77tmk’s at 2850 average, 2.425 COAL with lever.

Makes a man dream.

At 2.35” I was getting same 2750 in 16” barrel.

 

[Hardly_Hangin]

You all are making me “need” a short barrel ULUL… I have a 14.5” barrel on my SBR now, but making a short straight pull upper is very tempting.

Thats my thoughts. Honestly an SBR or pistol build makes way more sense for my style of hunting, but heck with the lightweight components as light as they are might as well make it as ULUL as practicable.

i think semi auto functionality makes a lot of sense in my area, and would be worth the weight penalty compared to a straight pull.

Ive killed probably close to 20 game animals with a rifle and i cant think of a single shot ive had over 100 yards.

 

[Hardly_Hangin]

Congrats on the little one!

My math says a 10 inch barrel will get me about 2425fps with my ammo (stand1 77tmk). That gets it to 395 yards before it drops below 1800fps. 260 yards for 2000fps.

Have you shot any animals? Curious if the extra penetration from slower velocities would yield higher % of exit wounds.

 

[packgoatguy]

Have you shot any animals? Curious if the extra penetration from slower velocities would yield higher % of exit wounds.

Not other than coyotes with the 223 77tmk. But out of a pile of elk, deer, bear with the 140eldm and 108eldm, we usually find the bullet in the off-side hide with a cup/core bullet like that. Even with higher impact velocities. It dumps all its energy inside the body cavity. Haven't had anything go further than 100 yards, and all but a couple dropped where they stood. But none of the shots had an impact velocity lower than 2000fps.

If you are looking for exits, then a bonded bullet probably is a better bet than what I'm using.