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ULTRA light weight picture thread....the under 6 crowd. (Page 6 of 39)
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Originally Posted By cj3waker:
that is under 6? Originally Posted By cj3waker:
Originally Posted By arjohnson:
<a href="http://smg.photobucket.com/user/arjohnson/media/DSCF7146_zps855eae99.jpg.html" target="_blank">http://img.photobucket.com/albums/v441/arjohnson/DSCF7146_zps855eae99.jpg</a> that is under 6? Without the aimpoint PRO it weighs 5 lbs 8 oz, so I'm guessing it's just a hair over with the aimpoint. I only had the aimpoint on for one range trip, it's currently no longer on this gun. I'll post a new updated pic soon. ETA updated pics plus my other sub 6 lb AR's Front to back 5 lbs 8 oz Stag lower, Spikes mid-length upper. 5 lbs 1 oz Anderson lower and CMMG dedicated 22 lt wt upper 5 lbs 15 oz BCM lower, Colt 6921 upper, DD Omega rail 
5 lbs 6 oz Stag Lower with CAR stock, CMMG 14.5" lt wt upper 
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btw PSA has Mag tactical lowers on sale 89.99
http://palmettostatearmory.com/index.php/mag-tactical-systems-ar-15-ultralight-stripped-lower-receiver-mg-g4-blk-black.html |
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I assembled my lower today.
If you add the CAR stock, which I like btw, it will come in at 633 grams or 22.33oz for the complete lower. I don't have all the upper parts in yet, but my estimates put it at 930 grams or 32.8oz. This can change. But at this rate the entire rig would be ~3.5lbs. This is a Mag Tactical build. I am doing some experimenting with this setup, some things which I may/may not like include: Accu-Group Poly Lower Parts (3oz Savings over a Milspec pack) Tac Com Delrin buffer (Will have an adjustable gas block) I am looking for: Poly / Aluminium Grip Screw (Nominal savings) Lighter Grip (A2 I have comes in at 67 grams) Lighter Buffer Tube (if there is such a thing) the one that I have is 105 grams. This will be a pistol pending the NFA Papers in progress. |
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I'm building a lightweight at the moment as well. Here are the specs;
Lower Receiver: Mag Tactical Systems Gen 4 Magnesium Lower Receiver (Owned) Receiver Extension: PWS 416 7075 Billet (Owned) Buffer: JP Enterprises Silent Buffer (Owned) Stock: MFT Battlelink Minimalist Stock, Mil Spec (Ordered) Trigger: Geissele SD3G (Ordered) Selector: Battle Arms Development CASS ST, Long/Short (Owned) Grip: BCM Gunfighter, Mod 2 (Ordered) Bolt Release: Seekins Billet (Owned) Magazine Release: Norgon Ambidextrous Release & Seekins Billet Button (Owned) Takedown Pins: Battle Arms Development Enhanced Pin Set (Owned) Other Small Parts: Colt (Owned) Magazines: Magpul M3, 30 and 20 rounders (Ordered) Sling: Blueforcegear VCAS padded QD sling (Owned) Upper Receiver: Mag Tactical Sytems Magnesium Upper Receiver (Ordered) Dust Cover: V7 Weapon Systems aluminum dust cover (Ordered) Barrel: BCM BCH 16" Lightweight Profile (Ordered) Rail System: BCM KMR13 (Ordered) Rail Covers: BCM KMR Rail Covers (When released) Gas Tube: V7 Weapon Systems Midlength Inconel Gas Tube (Ordered) Flash Suppressor: B. E. Meyers 249F (Ordered) Bolt & Carrier: Spikes Tactical Titanium Bolt Carrier & S7 Bolt (When released) Charging Handle: Raptor (Owned) Back Up Iron Sights: Spikes Tactical Lightweight BUIS (When released) Optic: Aimpoint T1, 2moa optic on a LaRue Absolute Co-witness mount, VFZ model (Back Ordered) Weapon Light: Surefire Scout M600 Ultra (Ordered) Weapon Light Mount: IWC Keymod Offset Mount (Ordered) Sling Mounts: Noveske Keymod QD Mount (Ordered) Some of the options aren't the lightest possible, but I feel it is a good balance of quality components. My estimate is being in the low 5 pound range. |
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Well, based on my lightweight rifle database project, I am now projecting my current rifle will be 5 lbs, 13 oz when complete, or 5 lbs, 15.5 oz with some Magpul BUIS.
We will see how close I get to my theoretical / calculated weight. Based on my research, it should be possible in theory to build a rifle at 4 lbs, 7 oz without a polymer lower or modifying any of the parts- parts cost for such a rifle is about $1600. |
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Originally Posted By Nada-Nada:
I assembled my lower today. If you add the CAR stock, which I like btw, it will come in at 633 grams or 22.33oz for the complete lower. I don't have all the upper parts in yet, but my estimates put it at 930 grams or 32.8oz. This can change. But at this rate the entire rig would be ~3.5lbs. This is a Mag Tactical build. I am doing some experimenting with this setup, some things which I may/may not like include: Accu-Group Poly Lower Parts (3oz Savings over a Milspec pack) Tac Com Delrin buffer (Will have an adjustable gas block) I am looking for: Poly / Aluminium Grip Screw (Nominal savings) Lighter Grip (A2 I have comes in at 67 grams) Lighter Buffer Tube (if there is such a thing) the one that I have is 105 grams. This will be a pistol pending the NFA Papers in progress. IM your address to me and I'll send you an Aluminum grip screw. |
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Originally Posted By eodinert:
Does anybody have the part number for the McMaster Carr aluminum grip screw? I have never been able to find them in McMaster Carr's catalog. Here is a link to the ONLY one I can find: LINK |
"When trading bullets it is better to give than to receive"
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
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Huge thanks Pursuit.
I did find the V7 Buffer Tube that comes in at 93 grams, whereas the one that I had from a CAR kit came in at 105 grams. These are very small amounts, but I have cut everywhere I can think of and it all adds up. The upper and lower will both be MAG Tactical which is a Magnesium Alloy. I will not be going with a carbon fiber handguard to save an ounce over the KMR since I want a top rail and a flexible system to use for mounting. I am going to try the Spikes Ti BCG as soon as I can along with TAC COM delrin buffer and syrac adjustable gas block if no other options come out. The Accu-Group poly FCG and other Lower Parts are also experimental for me, the trigger feels better than a milspec to me when I work the action. If no issues come up, it saves 3oz or so over a milspec parts kit. It will never be geissele, but it may be sufficient for this build. If I have issues I will swap out on a per group basis. I can use V7 Pins, Spikes new Light weight FCG, etc. The barrel is going to be turned down to pencil weight, and around 10" long so this not a full length class firearm for the purposes of this thread. I will post precise weight spreadsheet and pictures once it's all assembled. Estimated at 3.5lbs. Parts I am waiting for: KMR 10 Spikes Ti BCG Syrac Adjustable Gas Block |
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| On the barrel, you might look at a diameter of .550 - .565 |
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"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
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Originally Posted By Nada-Nada:
I am looking for: Poly / Aluminium Grip Screw (Nominal savings) Lighter Grip (A2 I have comes in at 67 grams) Lighter Buffer Tube (if there is such a thing) the one that I have is 105 grams. I think the Magpul Moe-K grip weighs in at 2 oz; about 57 grams. |
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Originally Posted By PursuitSS:
I have never been able to find them in McMaster Carr's catalog. Here is a link to the ONLY one I can find: LINK Originally Posted By PursuitSS:
Originally Posted By eodinert:
Does anybody have the part number for the McMaster Carr aluminum grip screw? I have never been able to find them in McMaster Carr's catalog. Here is a link to the ONLY one I can find: LINK Thanks.. |
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Originally Posted By PursuitSS:
On the barrel, you might look at a diameter of .550 - .565 Originally Posted By PursuitSS:
On the barrel, you might look at a diameter of .550 - .565 For sure. Going with as slim as a profile as possible. It will be .550 in front of and behind the gas block seat. The rest will be turned down as much as is within safety limits. Since this is not complete yet, I am estimating barrel weight currently. This is probably my biggest variable, altough there are other parts I do not have yet so I have not weighed I have weights from the manufacturers I am going off of., Originally Posted By PiccoloPlayer:
I think the Magpul Moe-K grip weighs in at 2 oz; about 57 grams. Thanks for the tip. I appreciate that. I will look into this. Between this and the S7 Buffer Tube that is about another ounce of the build. |
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Nada,
Do you have an upper with a forward assist? I'm putting a titanium unit in my Mag Tactical Systems upper. The titanium forward assist is about .4 ounces lighter than Milspec. Supposedly they're making other colors besides polished titanium. I ordered one last night. I plan to just have it Cerakoted. http://www.rainierarms.com/?page=shop/detail&product_id=4056 |
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Originally Posted By StrangerDanger:
Nada, Do you have an upper with a forward assist? I'm putting a titanium unit in my Mag Tactical Systems upper. The titanium forward assist is about .4 ounces lighter than Milspec. Supposedly they're making other colors besides polished titanium. I ordered one last night. I plan to just have it Cerakoted. http://www.rainierarms.com/?page=shop/detail&product_id=4056 Solid Tip. I bought a stripped mag tac upper so no dust cover/forward assist in it. Many of the light weight BCGs don't even have the cuts in it to use a FA, but the Spikes appears to. Not sure I will add one, in fact I hope to get a Mag Tac upper with no FA features at some point. Weight estimates are based on no FA / Dust Cover parts. This is a cool part I did not know existed, will use it for some of my other builds for sure. I did ask V7 if they have plans to make a Ti Bolt release. Milspec weights 12 gram. They should also consider the FA for those that need one for their builds. |
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I agree. I'd rather no forward assist on a lightweight build. I believe a company makes a derlin plug that acts as a delete option. If you're going with the Spikes titanium BCG, the FA will function. If you're using something like the lmos, might as well just opt for the plug. I wish mag tactical would hurry up and send out the rest of the preorders. I have two on order.
I don't think titanium would hold up well on the bolt release. I've sheared several of them off in the past in my pistol caliber builds. I've been using Seekins billet catches with good luck so far. I ordered a bag full of those aluminum grip screws today. Thanks! |
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This whole thread is a classic example of why there needs to be a "Lightweight Forum"!
Most of what is discussed here has been covered NUMEROUS times! |
"When trading bullets it is better to give than to receive"
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
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"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
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Originally Posted By StrangerDanger:
I agree. I'd rather no forward assist on a lightweight build. I believe a company makes a derlin plug that acts as a delete option. If you're going with the Spikes titanium BCG, the FA will function. If you're using something like the lmos, might as well just opt for the plug. I wish mag tactical would hurry up and send out the rest of the preorders. I have two on order. I don't think titanium would hold up well on the bolt release. I've sheared several of them off in the past in my pistol caliber builds. I've been using Seekins billet catches with good luck so far. I ordered a bag full of those aluminum grip screws today. Thanks! Schuster makes the plug. AIM surplus and Adco sell them. It's better to have something fill the hole than have an empty hole. The plug weights about 0.08 oz and the FA it replaces weighs very close to 0.75 oz. |
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Originally Posted By djkest:
Schuster makes the plug. AIM surplus and Adco sell them. It's better to have something fill the hole than have an empty hole. The plug weights about 0.08 oz and the FA it replaces weighs very close to 0.75 oz. Originally Posted By djkest:
Originally Posted By StrangerDanger:
I agree. I'd rather no forward assist on a lightweight build. I believe a company makes a derlin plug that acts as a delete option. If you're going with the Spikes titanium BCG, the FA will function. If you're using something like the lmos, might as well just opt for the plug. I wish mag tactical would hurry up and send out the rest of the preorders. I have two on order. I don't think titanium would hold up well on the bolt release. I've sheared several of them off in the past in my pistol caliber builds. I've been using Seekins billet catches with good luck so far. I ordered a bag full of those aluminum grip screws today. Thanks! Schuster makes the plug. AIM surplus and Adco sell them. It's better to have something fill the hole than have an empty hole. The plug weights about 0.08 oz and the FA it replaces weighs very close to 0.75 oz. I know that before I knew about the Rock River 9mm uppers I took a Colt M4 upper receiver and milled the forward assist and brass deflector off, then tig welded a piece in. Weight savings was over 2 ounces. Down side of Magnesium, I don't know whether you can weld it 
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"When trading bullets it is better to give than to receive"
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
NRA Endowment Member
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
NRA Endowment Member
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Originally Posted By PursuitSS:
I know that before I knew about the Rock River 9mm uppers I took a Colt M4 upper receiver and milled the forward assist and brass deflector off, then tig welded a piece in. Weight savings was over 2 ounces. Down side of Magnesium, I don't know whether you can weld it Hopefully MagTac pumps out some FAless uppers soon and we can roll to that setup. |
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Mag Tactical Systems says 4.8 ounces for the upper receiver stripped.
http://www.magtacticalsystems.com/index.php/uppers/assembled-uppers/product/219-assembled-upper#specs |
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Originally Posted By StrangerDanger:
Mag Tactical Systems says 4.8 ounces for the upper receiver stripped. http://www.magtacticalsystems.com/index.php/uppers/assembled-uppers/product/219-assembled-upper#specs Weighed on my scale, comes out to 135.1 grams or 4.76 oz. That's no FA and no Dust Cover. Milspec Dustcover, Spring and Pin - 21.2 grams Milspec FA assembly and roll pin - 23.1 grams |
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Good info. Thanks.
V7 told me this morning that they are releasing a .625" titanium gas block this week. Contact them if you want to get on a preorder status. They didn't offer any weight specs, but I assume it is similar to the .750. Probably looking at .75 - 1.0 ounce weight reduction where it matters most. |
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Originally Posted By StrangerDanger:
Good info. Thanks. V7 told me this morning that they are releasing a .625" titanium gas block this week. Contact them if you want to get on a preorder status. They didn't offer any weight specs, but I assume it is similar to the .750. Probably looking at .75 - 1.0 ounce weight reduction where it matters most. I do want! I think I have to try an adjustable first to see if it will run the Delrin Buffer and Spikes Ti BCG. If it's not reliable, I will go to a standard buffer / Spikes Ti BCG and a Ti .625 Gas Block. |
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Rule 1: Never add up the cost of gun parts.
It may seem stupid to spend 300 bucks to reduce the weight of a weapon by two ounces. It certainly isn't for everyone. Some people buy ten weapons and rarely shoot them all. I'd rather focus my funds on a single weapon. Makes sense on needing an adjustable gas block for your feather weight buffer. I'm curious to know how reliable your package will be. For my build, I'm not going for the absolute lightest possible assembly. My goal is to mitigate the weight gains for other quality parts such as the Raptor Charging handle. I'm hoping to build duty reliable in a lightweight package. So for areas like the buffer, I'm sticking with a heavier JP Silent Buffer. V7 also has a receiver extension that is 2 ounces lighter than my PWS 416 receiver extension. I'd rather the function of the the 416 over it. Plus, those weight differences diminish once you start adding the castle nut and receiver plate. |
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Originally Posted By Nada-Nada:
Aero Precision Skeleton Concept: 
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"When trading bullets it is better to give than to receive"
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
NRA Endowment Member
"Take your money and a traveler's bag. And if you don't have a sword, sell your clothes and buy one!" Jesus Christ - Luke 22.36
NRA Endowment Member
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Originally Posted By PursuitSS:
Originally Posted By PursuitSS:
Originally Posted By Nada-Nada:
Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg Looks better than all the other skeletonized lowers. |
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Originally Posted By Nada-Nada:
Only way I could consider this is if the holes were filled with a lighter material and the whole thing coated. Aesthetically and functionally, it requires that. This. I would be very interested in the lower you describe. I think the same concept could be successfully applied to the buffer tube. |
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Originally Posted By Nada-Nada: Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. I think it was really designed as a teaching tool. You can actually see what happens, even though it isn't much. |
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Originally Posted By usmcmp:
I think it was really designed as a teaching tool. You can actually see what happens, even though it isn't much. It's from Aero Precision's Facebook page. Apparently they are trying to gauge interest: The boss wants to know if there is interest in a skeletonized lower. "Like" and share if you want to see this as a product offering! (YouTube test video at http://www.youtube.com/watch?v=vqDPM2zozcM ) |
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Originally Posted By Nada-Nada:
Aero Precision Skeleton Concept:
Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. I might be interested with only the magwell skeletonized. The FCG area needs to be solid. |
Cruz/Paul 2016
This looks almost like the first 80% I built.....
Originally Posted By Nada-Nada:
Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. |
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Originally Posted By gotigers: I might be interested with only the magwell skeletonized. The FCG area needs to be solid. Originally Posted By gotigers: Originally Posted By Nada-Nada: Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. I might be interested with only the magwell skeletonized. The FCG area needs to be solid. I'd buy one
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Originally Posted By sweatpants:
I'd buy one Originally Posted By sweatpants:
Originally Posted By gotigers:
Originally Posted By Nada-Nada:
Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. I might be interested with only the magwell skeletonized. The FCG area needs to be solid. I'd buy one I am envisioning one little piece of gravel, or a twig ruining my day with that open FCG area. |
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Originally Posted By Alaska511: I am envisioning one little piece of gravel, or a twig ruining my day with that open FCG area. Originally Posted By Alaska511: Originally Posted By sweatpants: Originally Posted By gotigers: Originally Posted By Nada-Nada: Aero Precision Skeleton Concept: http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg]http://i.imgur.com/SY9F8ug.jpg Needs Mag Alloy and a Poly Fill. Would love to know the weight after executing as such. No interest at all with all the holes wide open. I might be interested with only the magwell skeletonized. The FCG area needs to be solid. I'd buy one I am envisioning one little piece of gravel, or a twig ruining my day with that open FCG area. Well the good news is that you could see the problem quickly  But seriously, the video Coyote posted kinda rules it out as a non-issue.
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This is a good thread bros. You are doing god's work, god's work indeed.
I think glockslaps 308 reserve honorary, if not actual 1st place. My Armalite 12.5" w JP rifle tube and m4 stock is 8lb WO sights, light etc. Barrel is basically .750 all the way. Think I'm gonna dip the bcg in acid lol. |
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Originally Posted By rightwingnut:
This is a good thread bros. You are doing god's work, god's work indeed. I think glockslaps 308 reserve honorary, if not actual 1st place. My Armalite 12.5" w JP rifle tube and m4 stock is 8lb WO sights, light etc. Barrel is basically .750 all the way. Think I'm gonna dip the bcg in acid lol. Hey, keep this nonsense to GD and out of the tech forums. Your post has nothing to do with the topic at hand.... On that skelotonized lower, no thanks. It probably doesn't save enough weight. Just think of all the dirt and dust and extra cleaning on your lower parts. I wish Aero hadn't wasted their time doing that and had already made slick side uppers. Oh well, their company. |
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Originally Posted By djkest:
Hey, keep this nonsense to GD and out of the tech forums. Your post has nothing to do with the topic at hand.... On that skelotonized lower, no thanks. It probably doesn't save enough weight. Just think of all the dirt and dust and extra cleaning on your lower parts. I wish Aero hadn't wasted their time doing that and had already made slick side uppers. Oh well, their company. Originally Posted By djkest:
Originally Posted By rightwingnut:
This is a good thread bros. You are doing god's work, god's work indeed. I think glockslaps 308 reserve honorary, if not actual 1st place. My Armalite 12.5" w JP rifle tube and m4 stock is 8lb WO sights, light etc. Barrel is basically .750 all the way. Think I'm gonna dip the bcg in acid lol. Hey, keep this nonsense to GD and out of the tech forums. Your post has nothing to do with the topic at hand.... On that skelotonized lower, no thanks. It probably doesn't save enough weight. Just think of all the dirt and dust and extra cleaning on your lower parts. I wish Aero hadn't wasted their time doing that and had already made slick side uppers. Oh well, their company. 
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A few V7 Parts came in tonight.
V7 Castle Nut and End Plate: 11 grams, vs 34 grams for milspec V7 End Plate has a nice QD in it as well. Buffer retainer is .3 grams, vs 2.1 grams for the milspec. Tiny amount here, but neat I suppose. Waiting on my V7 Receiver Extension. If anyone has a milspec carbrine length gas tube I'd like to know the weight. |
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Originally Posted By Nada-Nada:
A few V7 Parts came in tonight. V7 Castle Nut and End Plate: 11 grams, vs 34 grams for milspec V7 End Plate has a nice QD in it as well. Buffer retainer is .3 grams, vs 2.1 grams for the milspec. Tiny amount here, but neat I suppose. Waiting on my V7 Receiver Extension. If anyone has a milspec carbrine length gas tube I'd like to know the weight. 17 grams on the gas tube. |
ULTRA light weight picture thread....the under 6 crowd. (Page 6 of 39)
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