Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Page AR-15 » AR Discussions
AR Sponsor: bravocompany
Site Notices
Page / 127
Link Posted: 6/23/2018 3:20:14 PM EDT
[Last Edit: pscot468] [#1]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By breastroker:
My enhanced V7 tool steel bolt catch @ 7.970 grams or 0.2805 ounces by drilling a hole through the paddle.

So almost 3 grams savings with the aluminum bolt catch.
View Quote
I'm still mad those Hesse uppers don't exist anymore!!! I looked on GunBroker, no joy!

The overpriced badger ti bolt catch weighs 7 grams.
Link Posted: 6/24/2018 11:57:09 PM EDT
[#2]
Working on my lightest Tegra lower, looks like I already did almost everything that can be done to it. Started at 172 grams today and ended up at 171 grams.

But the aluminum bolt catch should cut another 2.98 grams, bringing the lower close to 5.93 ounces. Should be here tomorrow.

Hoping that new CF buttstock is less than 2.40 ounces, so lower would be 5.93 + 2.4 + 1.1 spring + 0.59 oz. Taccom buffers for a total of 10.02 ounces for the lower. I don't use a castle nut or end plate with polymer lowers as they are held by stiction.

With the Luth-AR CH, my scale @ 0.76 ounces. New weight of upper is 31.80 ounces, complete rifle would be 31.80 + 10.02 ounces or 42.05 ounces or 2.625 pounds.

My 10.5 inch CF hand guard tube weighs 1.60 ounces or 0.152 ounces per inch. So if I cut it back to 9.0 inches it should be 1.371 ounces, savings 0.228 ounces!

So the upper would weigh 31.572 ounces, rifle would be 41.592 ounces or 2.599 pounds.
Link Posted: 6/25/2018 4:16:22 AM EDT
[Last Edit: pscot468] [#3]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By breastroker:
Working on my lightest Tegra lower, looks like I already did almost everything that can be done to it. Started at 172 grams today and ended up at 171 grams.

But the aluminum bolt catch should cut another 2.98 grams, bringing the lower close to 5.93 ounces. Should be here tomorrow.

Hoping that new CF buttstock is less than 2.40 ounces, so lower would be 5.93 + 2.4 + 1.1 spring + 0.59 oz. Taccom buffers for a total of 10.02 ounces for the lower. I don't use a castle nut or end plate with polymer lowers as they are held by stiction.

With the Luth-AR CH, my scale @ 0.76 ounces. New weight of upper is 31.80 ounces, complete rifle would be 31.80 + 10.02 ounces or 42.05 ounces or 2.625 pounds.

My 10.5 inch CF hand guard tube weighs 1.60 ounces or 0.152 ounces per inch. So if I cut it back to 9.0 inches it should be 1.371 ounces, savings 0.228 ounces!

So the upper would weigh 31.572 ounces, rifle would be 41.592 ounces or 2.599 pounds.
View Quote
:O ...... You win the NO-prize breastroker. Congratulations. I may even send you my titanium cam pin, i feel like you've earned it. How about this, if you ever get your hands on a Hesse upper, I'll sell you my Ti cam pin, lol. Just out of curiosity. 2.5 lbs would be insane!!!
Link Posted: 6/25/2018 9:32:51 AM EDT
[#4]
Not sure 2.5 pounds can happen knowing how hard getting to 42 ounces have been.

Cutting another 2 ounces seems impossible, unless we could get a titanium barrel extension and that Hesse upper receiver, and a titanium cam pin, plus a ultra lite profile aluminum carrier.
Link Posted: 6/25/2018 10:43:20 AM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By breastroker:
Not sure 2.5 pounds can happen knowing how hard getting to 42 ounces have been.

Cutting another 2 ounces seems impossible, unless we could get a titanium barrel extension and that Hesse upper receiver, and a titanium cam pin, plus a ultra lite profile aluminum carrier.
View Quote
All that stuff would put you well under 2.5 lbs. PursuitSS, what have you got planned for that hesse upper??? Lol.
Link Posted: 6/25/2018 11:35:27 AM EDT
[#6]
Link Posted: 6/25/2018 11:53:24 AM EDT
[Last Edit: pscot468] [#7]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PursuitSS:

Sorry, it’s not going anywhere. I think a friend of mine purchased one at the same time. I’ll check with him.
View Quote
:D Dibs!!! Breaststroker, I am calling dibs! Nah, idk with an action spring as light as mine I might need to keep the forward assist.
Link Posted: 6/25/2018 2:34:48 PM EDT
[#8]
Huge math errors:

Working on my lightest Tegra lower, looks like I already did almost everything that can be done to it. Started at 172 grams today and ended up at 171 grams.

But the PAMAX Tactical aluminum bolt catch (5 grams) should cut another 2.98 grams, bringing the lower close to 5.93 ounces. Should be here tomorrow.

Hoping that new CF buttstock is less than 2.40 ounces, so lower would be 5.93 + 2.4 + 1.138 oz. spring + 0.578 oz. Taccom buffers for a total of 10.046 ounces for the lower. I don't use a castle nut or end plate with polymer lowers as they are held by stiction.

With the Luth-AR CH, my scale @ 0.76 ounces. New weight of upper is 31.80 ounces, complete rifle would be 31.80 + 10.046 ounces or 41.846 ounces or 2.615 pounds.

My 10.5 inch CF hand guard tube weighs 1.60 ounces or 0.152 ounces per inch. So if I cut it back to 9.0 inches it should be 1.371 ounces, savings 0.228 ounces!

So the upper would weigh 31.572 ounces, rifle would be 41.618 ounces or 2.601 pounds.
Link Posted: 6/25/2018 3:06:54 PM EDT
[#9]
Link Posted: 6/25/2018 3:53:06 PM EDT
[#10]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PursuitSS:
Who would have EVER THOUGHT that ANYTHING produced by Hesse Arms would be desirable?
View Quote
Lol idk. Was adjustable gas a thing back then?
Link Posted: 6/25/2018 4:16:41 PM EDT
[#11]
Link Posted: 6/25/2018 4:47:22 PM EDT
[#12]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PursuitSS:
Adjustable gas didn’t exist when I started using aluminum bolt carriers. That came years later.

Speaking of aluminum carriers, I’m thinking about trying to put one of my aluminum carriers on a diet, considering that I’ve yet to find an aluminum carrier that isn’t a direct copy dimensionally of an M-16 carrier I’m pretty sure I can get one down to <3 ounces.
View Quote
You could attempt to match the contour of the jp lmos steel carriers! That would be incredibly lightweight.
Link Posted: 6/25/2018 5:28:35 PM EDT
[#13]
Link Posted: 6/25/2018 5:31:07 PM EDT
[#14]
Link Posted: 6/25/2018 6:03:24 PM EDT
[Last Edit: pscot468] [#15]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PursuitSS:
Has anyone looked into the Kaiser US Plastic uppers & Lowers?
View Quote
Yes!! I use that receiver set for my 50 beowulf. It's great! Very tight fit and it's got aluminum inserts everywhere. It has aluminum barrel nut threads and gas tube hole. My only complaint is I wish the grip screw threads were aluminum. Just be sure and use a reaction rod or Bev block if you want to assemble it with over 30 ft-lbs of barrel nut torque. Kaiser sells a cheap aluminum reaction rod knock off if you don't already have one. Another note, the Kaiser lower can use any upper, the Kaiser upper will only work with the Kaiser lower.
Link Posted: 6/25/2018 6:49:36 PM EDT
[#16]
Link Posted: 6/25/2018 6:53:12 PM EDT
[#17]
Got the two aluminum bolt catches, I really like them. Weighed on my powder scale, 5 gram weight @ 5.000 grams, 20 gram @ 20.000 grams

One weighed 5.125 grams and the other 5.145 grams. So these are good U weights.

The enhanced V7 tool steel bolt catch I remover weighed 7.365 grams, so I was able to cut 2.140 grams.

Weighed the lower @ 5.95 ounces.
Link Posted: 6/25/2018 6:56:38 PM EDT
[Last Edit: breastroker] [#18]
Already reprofiled an aluminum carrier:

I worked on my Whiskey Arms aluminum carrier changing it from M4 profile.

Ended up at 79 grams or 2.7866 ounces, started at 3.05 ounces.

The first 2 tenths were easy, would take a lot of work to cut anther tenth.

So BCG will be close to: 155.172 grams or 5.4735 ounces

Carrier: 79 grams
Firing pin 4.510 grams
Cam pin 6.910 grams
RCA key 20.300 grams
Bolt 556 NiB 43.345 grams
2 key screws 1.035 grams (measured my M4 screws)
SS FP retainer 0.720 grams

Got my Ti64 titanium screws. The #8-32 x 1/2", Socket Head Steel Screws weighed 1.065 grams each.

The #8-32 x 1/4", Tapered titanium Socket Head Screws weighed 0.695 grams each, I really like them. Nice snug fit in the key.

Finished Whiskey/RCA/ BCG weighed 154 grams with titanium 8/32x1/4 screws. That's 5.43219 ounces

Link Posted: 6/25/2018 7:04:46 PM EDT
[#19]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PursuitSS:
Any chance you weighed it?
View Quote
I did years ago. It matched the manufacturer spec if I remember correctly.
Link Posted: 6/25/2018 8:25:33 PM EDT
[Last Edit: asorel] [#20]
Jek, I think the "grips" section of the spreadsheet would benefit from having columns for grip angle, and whether or not the grip has a beavertail. I'm aware that doing this work is pretty tedious so I made a copy of the spreadsheet and went through the trouble for you. I had to eyeball a couple times on grip angle as it wasn't listed by the manufacturer, but I think I did all right. I also added a few comments regarding items that may be discontinued, so be sure to look out for those.
Link Posted: 6/26/2018 3:55:29 AM EDT
[#21]
Now that is a) a good suggestion and b) some of the best user support I've got yet. I'll check it out...
Link Posted: 6/28/2018 3:29:52 PM EDT
[#22]
hey breastroker can we see a picture of your rifle? I wanna see what a 2.6 lb rifle looks like
Link Posted: 6/28/2018 6:35:14 PM EDT
[#23]
Not finished yet, cutting the CF handguard today and won't get the new CF buttstock until after 4th of July.

Started July 2016 and slowly getting lighter and lighter.

https://68forums.com/forums/showthread.php?62169-Going-to-try-for-a-3-0-pound-556-with-16-inch-Faxon-barrel
Link Posted: 6/29/2018 12:30:05 PM EDT
[Last Edit: JerDerv] [#24]
Gentlemen, in case this hasn't been posted yet v7's sister company dark hour defense has an aluminum A2 style "Comp", i do not think this has any flash suppression so it may just be a fancy thread protector, but its lightweight none the less.

https://www.darkhourdefense.com/collections/muzzle-devices/products/5-56-aluminum-a2-style-compensator
Link Posted: 6/29/2018 1:48:41 PM EDT
[Last Edit: pscot468] [#25]
Come to papa aluminum a2!!! That's lighter than the a-hole micro, significantly!!! It's 17 grams. Plus it's made of better aluminum.
Link Posted: 6/29/2018 9:29:33 PM EDT
[#26]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By JerDerv:
Gentlemen, in case this hasn't been posted yet v7's sister company dark hour defense has an aluminum A2 style "Comp", i do not think this has any flash suppression so it may just be a fancy thread protector, but its lightweight none the less.

https://www.darkhourdefense.com/collections/muzzle-devices/products/5-56-aluminum-a2-style-compensator
View Quote
That's...really damn light. At 1500 rounds usable life however, I'm afraid I'll have to pass. Finally got everything for my next build ordered, now I just have to wait for that Faxon barrel to come out of backorder and ship. Will post pics here when it's together, hoping for below four pounds without optics.
Link Posted: 6/29/2018 9:48:26 PM EDT
[#27]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By asorel:
That's...really damn light. At 1500 rounds usable life however, I'm afraid I'll have to pass. Finally got everything for my next build ordered, now I just have to wait for that Faxon barrel to come out of backorder and ship. Will post pics here when it's together, hoping for below four pounds without optics.
View Quote
Well the a-hole micro can handle well over 4000 rds of full auto so i think that number might be a little conservative... unless 7075 just can't handle heat as well as 6061? Any metallurgists here???
Link Posted: 6/29/2018 10:38:47 PM EDT
[#28]
Faxon needs to make me a prototype slim 3 prong slim FH from 7075 with adamantium coating. That would own all n

The A2 is cool, but I'd want to lathe off the unnecessary metal. Who's going to use a BFA with it? Probably no one.
Link Posted: 6/30/2018 12:31:58 AM EDT
[#29]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By jekbrown:
Faxon needs to make me a prototype slim 3 prong slim FH from 7075 with adamantium coating. That would own all n

The A2 is cool, but I'd want to lathe off the unnecessary metal. Who's going to use a BFA with it? Probably no one.
View Quote
No no, adamantium is way too heavy, mere molecules of the stuff weigh in at over 100 lbs! Also it doesn't exist... Yet. Lol.
Link Posted: 6/30/2018 2:30:19 PM EDT
[#30]
So i'm a little disappointed. I was hoping to get my "duty" 308 down to under 8lbs by replacing all the small parts with lightweight options. Well no joy. It's now 9.8 lbs. The only way to reach my target would be to buy another v7 magnesium handguard, and magnesium handguards get a little too hot for my liking. Plus $$$$$$. I got a 15 in aero handguard on it now... I'm sure i'll get around to replacing the handguard with a v7 one but unfortunately it's not in the cards right now. That might get me under 9lbs though...
Link Posted: 6/30/2018 4:49:46 PM EDT
[Last Edit: asorel] [#31]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By pscot468:
So i'm a little disappointed. I was hoping to get my "duty" 308 down to under 8lbs by replacing all the small parts with lightweight options. Well no joy. It's now 9.8 lbs. The only way to reach my target would be to buy another v7 magnesium handguard, and magnesium handguards get a little too hot for my liking. Plus $$$$$$. I got a 15 in aero handguard on it now... I'm sure i'll get around to replacing the handguard with a v7 one but unfortunately it's not in the cards right now. That might get me under 9lbs though...
View Quote
No love for the Brigand Arms handguards? I know you said heat was a concern, but mine have never gotten more than "warm"--definitely noticeable but not what I'd call uncomfortable. $$$ is still a concern with those of course, but they are lighter and you may or may not have better luck with heat.
Link Posted: 6/30/2018 5:51:05 PM EDT
[Last Edit: pscot468] [#32]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By asorel:
No love for the Brigand Arms handguards? I know you said heat was a concern, but mine have never gotten more than "warm"--definitely noticeable but not what I'd call uncomfortable. $$$ is still a concern with those of course, but they are lighter and you may or may not have better luck with heat.
View Quote
Well i really want to stay fully modular, the semi modular design of the brigand handguards aren't for me. The magnesium handguards seem to be the best choice. I'll be staying semi auto on this one, couldn't get the echo trigger to work in the large frame ar's. I might buy another echo trigger for the 50 beowulf though! :D probably not, i'd need another iron city bolt carrier. $$$$$$$$ 10 lbs sounds like alot when people (cough, breastroker) are close to building 2.5 lb rifles, but i can deal with 9.8 lbs. That's with a heavy contour, double chrome, cold hammer forged FN barrel made from a m240 blank. It's definitely lighter than that old ptr-91 it replaced, lol. That's with an eotech, iron sights, DD bipod mount, and a 7075 commercial length buffer tube. It's very well balanced and had zero recoil. The only plastic on that bad boy is the mako GL shock buttstock. Take that FN Scar 17s!!! :D
Link Posted: 7/1/2018 12:37:44 PM EDT
[#33]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By pscot468:
Come to papa aluminum a2!!! That's lighter than the a-hole micro, significantly!!! It's 17 grams. Plus it's made of better aluminum.
View Quote
I have it 19.2grams - 0.67oz!
 I like it, and I would think it should last way more than 1500rds! Have not shot it yet but we'll see soon!Attachment Attached File
Link Posted: 7/1/2018 12:44:27 PM EDT
[Last Edit: pscot468] [#34]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Micron:

I have it 19.2grams - 0.67oz!
 I like it, and I would think it should last way more than 1500rds! Have not shot it yet but we'll see soon!https://www.AR15.Com/media/mediaFiles/474614/20180701_123215_HDR-1310x2328-593507.JPG
View Quote
Ugh... Dark hour's website said 11 grams. Wasted my money. Well... Maybe not. It's .03 oz lighter than the a-hole micro.
Link Posted: 7/2/2018 7:21:51 AM EDT
[#35]
Building a lightweight left handed gun.

I currently am running a Stag left handed upper (8.6 oz w/o bolt and CH).

Was wondering how much metal weight could be removed (w/o removing dust cover and forward assist) and maintaining strength?

I have seen where people hog out the back of the brass deflector (and how much would that save)?

Any other areas?  I want to do all this before ceracoating it...

Thanks ARFCOM
Link Posted: 7/2/2018 1:01:04 PM EDT
[Last Edit: pscot468] [#36]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By TexasTony:
Building a lightweight left handed gun.

I currently am running a Stag left handed upper (8.6 oz w/o bolt and CH).

Was wondering how much metal weight could be removed (w/o removing dust cover and forward assist) and maintaining strength?

I have seen where people hog out the back of the brass deflector (and how much would that save)?

Any other areas?  I want to do all this before ceracoating it...

Thanks ARFCOM
View Quote
Welcome to the thread Tony! The most reliable way to reduce weight before you have to break out the mini mill is to replace as many steel parts as possible with lightweight titanium, aluminum, or polymer versions. They even have lighter weight steel options. Have you seen jekbrowns parts weight database? It's in his sig, here's the link anyways. This is the most valuable tool for building a lightweight gun!
https://docs.google.com/spreadsheets/d/1I6Qb6kAJjChEJ56qhznv2291c5UHRDyNXuSXGObumqM/htmlview#

First things first, I'd replace that bolt carrier, forward assist, charging handle, and port door/rod. That'll save you close to a lb with the right parts. What kind of barrel and handguard are you using?
Link Posted: 7/2/2018 3:44:38 PM EDT
[#37]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By pscot468:

Well i really want to stay fully modular, the semi modular design of the brigand handguards aren't for me. The magnesium handguards seem to be the best choice. I'll be staying semi auto on this one, couldn't get the echo trigger to work in the large frame ar's. I might buy another echo trigger for the 50 beowulf though! :D probably not, i'd need another iron city bolt carrier. $$$$$$$$ 10 lbs sounds like alot when people (cough, breastroker) are close to building 2.5 lb rifles, but i can deal with 9.8 lbs. That's with a heavy contour, double chrome, cold hammer forged FN barrel made from a m240 blank. It's definitely lighter than that old ptr-91 it replaced, lol. That's with an eotech, iron sights, DD bipod mount, and a 7075 commercial length buffer tube. It's very well balanced and had zero recoil. The only plastic on that bad boy is the mako GL shock buttstock. Take that FN Scar 17s!!! :D
View Quote
https://brigandarms.com/product/handguard-carbon-black-series/  They now have MLOK DPMS compatible CF hand-guards. the 12 inch model clocks in at 7.7 oz according to their website.
Link Posted: 7/2/2018 3:54:29 PM EDT
[#38]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By j_cobbers:

https://brigandarms.com/product/handguard-carbon-black-series/  They now have MLOK DPMS compatible CF hand-guards. the 12 inch model clocks in at 7.7 oz according to their website.
View Quote
The magnesium is still a better choice for me. I wish somebody would make an aluminum barrel nut for the v7 308 handguards.
Link Posted: 7/2/2018 8:50:58 PM EDT
[#39]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By j_cobbers:
https://brigandarms.com/product/handguard-carbon-black-series/  They now have MLOK DPMS compatible CF hand-guards. the 12 inch model clocks in at 7.7 oz according to their website.
View Quote
Just an FYI to the group, I contacted BA because their site didn't have the M weight for ALL of the new carbon black series HGs and they sent me a press release PDF that, according to them, has the most accurate wights currently available from them... some of which differed from their regular web site. Not sure what's up there, but it's the latest scoop for anyone wondering why there might be a discrepancy between the pwd and BAs site.
Link Posted: 7/3/2018 12:50:02 AM EDT
[Last Edit: jekbrown] [#40]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By asorel:
Jek, I think the "grips" section of the spreadsheet would benefit from having columns for grip angle, and whether or not the grip has a beavertail. I'm aware that doing this work is pretty tedious so I made a copy of the spreadsheet and went through the trouble for you. I had to eyeball a couple times on grip angle as it wasn't listed by the manufacturer, but I think I did all right. I also added a few comments regarding items that may be discontinued, so be sure to look out for those.
View Quote
officially integrated. I did switch the columns around just because I am soooo used to M/U being columns being C/D that there's no way I can switch that no and maintain by sanity. Thanks again for your contribution!

Also added the Al A2 clone, and some jerk contributed one Riton optic to the user data page, which meant that my OCD compelled me to add ALL of their other optics also.  

and, oh yeah, SLR added clamp on Ti GBs to their line...not sure when but I added them too. OK, I'm going to watch Homeland now.
Link Posted: 7/3/2018 11:31:07 AM EDT
[Last Edit: asorel] [#41]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By jekbrown:

officially integrated. I did switch the columns around just because I am soooo used to M/U being columns being C/D that there's no way I can switch that no and maintain by sanity. Thanks again for your contribution!

Also added the Al A2 clone, and some jerk contributed one Riton optic to the user data page, which meant that my OCD compelled me to add ALL of their other optics also.  

and, oh yeah, SLR added clamp on Ti GBs to their line...not sure when but I added them too. OK, I'm going to watch Homeland now.
View Quote
Both of those last two were me . The magnifier was the only one I was particularly interested in, so I didn't look at the other Riton optics. Nice to know there's a 3x mag below 11 oz out there though., makes the weight difference between red dot+magnifier and Accupoint+mount even greater.

I've also got some ETS mags in the mail--translucent mags that are purportedly more durable than PMAGS, with an integral coupler to lock two magazines together. I doubt they'll be lighter than my MFT magazines, but it'll be interesting to see how they compare in weight to PMAGS.
Link Posted: 7/3/2018 12:05:03 PM EDT
[#42]
Got my Shooting Innovations BCG down to 5.09oz from 5.89oz stock!  Just a bit of drilling and grinding,  Not the prettiest thing now but if it holds up I'll clean it up a bit with some fine stones!Attachment Attached File

Attachment Attached File

Attachment Attached File
Link Posted: 7/3/2018 1:25:48 PM EDT
[#43]
Nice, almost 0.4 ounces less than my Whiskey BCG.

I might try that on my BRDC (Oops said a bad word)
Link Posted: 7/3/2018 10:05:19 PM EDT
[#44]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By asorel:

Both of those last two were me . The magnifier was the only one I was particularly interested in, so I didn't look at the other Riton optics. Nice to know there's a 3x mag below 11 oz out there though., makes the weight difference between red dot+magnifier and Accupoint+mount even greater.

I've also got some ETS mags in the mail--translucent mags that are purportedly more durable than PMAGS, with an integral coupler to lock two magazines together. I doubt they'll be lighter than my MFT magazines, but it'll be interesting to see how they compare in weight to PMAGS.
View Quote
C'mon man, new brands for the pwd are why I don't sleep enough. Gotta get them all in there before I stop! Oh well, could have been worse. The day I put all the SLR rails in there, now that was a bitch. 36482627 different lengths for each line...and full top rail and partial top rail variants as well. Damn that was a lot of typing.
Link Posted: 7/4/2018 9:13:24 AM EDT
[Last Edit: TexasTony] [#45]
Faxon: 18 inch GUNNER, CF 17 inch handguard, slim flash hider, and LW gasblock.

It is less "super light weight" and more "What Would Stoner Do?" gun (InRange TV with Ian and Carl).

As it stands now with upper, bolt, CH (with dust cover and FA), 18 inch barrel, handguard, gas block, rifle length gas tube = 3lbs 10.5 ounces.
For reference, a standard upper with 16 inch M4 profile (flattop) with a Magpul flip up and standard front sight base weighs 4 lbs 2 ounces.

With plastic pop up irons and (1 MLOK rail for front sight), MLOK quick detach sling accessory I am guessing 3lbs 14 oz even.

I wanted a desert gun I could bet my ass on with the extra velocity of the 18 inch tube, so no lightweight bolts, etc.

With shortened LOP GWAC lower my hope is a 6 lb gun with a cheap shoulder sling, plastic irons and light (no mag).

My last LW project was a full sized 18 inch barreled (with FH) .308 (slick side but standard AR10 JP lightweight bolt) and including a 3x9 scope and mount weighs in at 7lb 4 ounces (no sling or mag).  Be a great hunter for someone who did.  I might consider parting with it.
Link Posted: 7/4/2018 10:22:26 AM EDT
[#46]
Nothing wrong with applying lightweight AR ideas / parts to non-ultralights. My DMR build is 8.6lbs but it actually has quite a few ultralight things going on...Ti GB, Ti screws, sorta light steel carrier, lighter sights/light, light rail system etc. I wanted a heavier bbl profile, so I tried to do everything I could to keep the front end light (other than bbl choice).
Link Posted: 7/4/2018 1:47:49 PM EDT
[#47]
Easy now to mix and match longer or heavier barrels with light or ultra lightweight parts.

I built my 224 Valkyrie with 20 inch barrel using the Faxon barrel that weighs 31.40 ounces (1.96 pounds). Used a light weight steel BCG and a ultra light BAD gas block and a thread protector. Used a no FA upper not super light weight, I could have used a Fostech upper and cut several more ounces. Also used a 15 inch light weight blue anodized hand guard.

Upper comes in at 3.80 pounds (60.9 ounces) but could have easily built it at 55 to 58 ounces with spare ultra light weight parts.

I could shoot it with lowers that weight as light as 11 ounces, but shooting with a walnut stocked lower that weighs 32 ounces.
Link Posted: 7/5/2018 3:51:12 PM EDT
[#48]
I'm going to be swapping around optics on some guns and probably moving the MRO off my lightweight gun.

Anyone have experiences with the TA44? Looks like a good option to keep that gun light and also pick up some help for holdovers.
Link Posted: 7/6/2018 7:10:06 AM EDT
[#49]
Well my 6.5 in barrel 300 blackout is spewing hot powder in my face and back into the action. I'm gonna try a KAK short flash can, see if that helps burn up some of the powder. It's fine in semi auto, but when you fire in echo mode, simulating full auto, lol lets just say it stings a little. I'm using a suppressor compatible charging handle so i doubt a "gas busting" charging handle would help much. If the flash can doesn't work i have a 8" ballistic advantage barrel with 5r rifling i can use, or i could order a PSA 10.5 in double chrome CHF barrel, or a spikes 10 in chf. I don't want to go that long though... Hopefully the flash can does the trick!!!
Link Posted: 7/6/2018 10:48:26 AM EDT
[#50]
Yet another reason why the "rear charging" design of the modern AR sucks. Have you done the high temp silicone thing on the CH? Worth a try, it's dirt cheap.
Page / 127
Page AR-15 » AR Discussions
AR Sponsor: bravocompany
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top