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Posted: 4/5/2016 1:48:16 AM EDT
| I'm trying to shave some weight off of my LE6920. Would I save more weight by dropping in a 5 oz MI 2 piece handguard or free floating it and adding a 9.4 oz MI handgaurd( with barrel nut). My FF install would include shaving down the existing a2 sight. Not sure how much weight I would loose by shaving the A2 sight and loosing the sling swivel, bayonet lug, and delta ring. I'm new to this so any input would be appreciated. Also, I can't seem to find the weights of a 6920 stripped lower and upper. Just curries, but I'm guessing about a pound combined. |
| Well the thing is I swapped out the factory handgaurd for an ATI aluminum handgaurd when I first got the rifle. I wasn't too knowledgeable back then and didn't consider weight. After adding an optic and mount I ended up with a 9 lbs carbine lol. I recently wondered why my rifle was so heavy. I took the thing off today for the first time in a couple years and it weighed almost a pound with only one of the rail sections installed! From what I understand, the factory handguard is around 8 oz. If I go with the drop in 5 oz handguard I'll save 3 oz off of the factory weight and 11oz from its current configuration. The FF option isn't as clear because other parts are being taken off and parts being modified but I'm thinking it might be a wash. If I would save more weight, FF might be worth it. Why are 6920s heavy from the factory? Is it all barrel or do the stripped uppers and lowers weight more then what people are using for their builds? |
| Don't cut your front sight base. Get a lo-profile gas block and save your FSB along with the pins. One of these days, you are going to want to sell or do something else with your rifle, and you will be back on here asking for a used FSB and you won't be able to use it because the taper pin holes won't line up, then you will be back asking where you can spend even more money for someone to install a new one. |
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Well the thing is I swapped out the factory handgaurd for an ATI aluminum handgaurd when I first got the rifle. I wasn't too knowledgeable back then and didn't consider weight. After adding an optic and mount I ended up with a 9 lbs carbine lol. I recently wondered why my rifle was so heavy. I took the thing off today for the first time in a couple years and it weighed almost a pound with only one of the rail sections installed! From what I understand, the factory handguard is around 8 oz. If I go with the drop in 5 oz handguard I'll save 3 oz off of the factory weight and 11oz from its current configuration. The FF option isn't as clear because other parts are being taken off and parts being modified but I'm thinking it might be a wash. If I would save more weight, FF might be worth it. Why are 6920s heavy from the factory? Is it all barrel or do the stripped uppers and lowers weight more then what people are using for their builds? They aren't heavier than any other AR, except for the LW profile barrel models. The receivers have very little to do with it, unless you go plastic. You are only talking a few ounces, there. Most of it is in the barrel, I have no motivation to mislead you. Good luck. |
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Quoted: Well the thing is I swapped out the factory handgaurd for an ATI aluminum handgaurd when I first got the rifle. I wasn't too knowledgeable back then and didn't consider weight. After adding an optic and mount I ended up with a 9 lbs carbine lol. I recently wondered why my rifle was so heavy. I took the thing off today for the first time in a couple years and it weighed almost a pound with only one of the rail sections installed! From what I understand, the factory handguard is around 8 oz. If I go with the drop in 5 oz handguard I'll save 3 oz off of the factory weight and 11oz from its current configuration. The FF option isn't as clear because other parts are being taken off and parts being modified but I'm thinking it might be a wash. If I would save more weight, FF might be worth it. Why are 6920s heavy from the factory? Is it all barrel or do the stripped uppers and lowers weight more then what people are using for their builds? WAT??? |
| Thanks for the help. It's not that I think anyone is trying to mislead me, I'm just having trouble wrapping my head around it. I guess I can share what lead to this. I'm plaining my first full build and I started to do some research online. The barrel I decided on is longer and heavier than the 6920s at 18" 34 oz. I have heard of people using this exact barrel in a build and the rifle ends up being under 8 lbs with optic,sling ect. So I weigh my 6920 and its 9 lbs and so I think what gives? It sends me on a mission to find the extra weight. I have also heard several people say it is easy to build a sub 5 lbs rifle with a 16" m4 barrel optic included but the colts come from the factory at 7 lbs with irons and plastic handguards. You see why I'm confused? How are people building rifles lighter than colts with heavier barrels? I know what every part weighs but the receivers, that is why I suspected them. |
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Thanks for the help. It's not that I think anyone is trying to mislead me, I'm just having trouble wrapping my head around it. I guess I can share what lead to this. I'm plaining my first full build and I started to do some research online. The barrel I decided on is longer and heavier than the 6920s at 18" 34 oz. I have heard of people using this exact barrel in a build and the rifle ends up being under 8 lbs with optic,sling ect. So I weigh my 6920 and its 9 lbs and so I think what gives? It sends me on a mission to find the extra weight. I have also heard several people say it is easy to build a sub 5 lbs rifle with a 16" m4 barrel optic included but the colts come from the factory at 7 lbs with irons and plastic handguards. You see why I'm confused? How are people building rifles lighter than colts with heavier barrels? I know what every part weighs but the receivers, that is why I suspected them. You have a SOCOM? |
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how much do you really think you are going to save? Think about your post....
this obsession with weight on a plastic rifle is borderline absurd. If you can't raise your fully loaded, optic on, A2 buttstock AR with one hand, aim and fire, then saving weight is not your issue. unless of course this is for a woman and then disregard 
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Id just drop in a magpul unless you want to free float.
I ditched a knights drop in, shaved the front sight, and put in a MI handguard. It was a big drop where it matters most, out on the barrel. Whole process cost me $100 after selling the quad rail, and putting on an Mbus front sight. |
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how much do you really think you are going to save? Think about your post.... this obsession with weight on a plastic rifle is borderline absurd. If you can't raise your fully loaded, optic on, A2 buttstock AR with one hand, aim and fire, then saving weight is not your issue. unless of course this is for a woman and then disregard "So I weigh my 6920 and its 9 lbs" is crazy for a typical AR. My 18" Grendel doesnt weigh that. |
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Don't cut your front sight base. Get a lo-profile gas block and save your FSB along with the pins. One of these days, you are going to want to sell or do something else with your rifle, and you will be back on here asking for a used FSB and you won't be able to use it because the taper pin holes won't line up, then you will be back asking where you can spend even more money for someone to install a new one. Why? I sold my colt barrel with a shaved gas block the day i posted it on the EE. Many people like a barrel that comes with a pinned low profile block. |
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Why? I sold my colt barrel with a shaved gas block the day i posted it on the EE. Many people like a barrel that comes with a pinned low profile block. Quoted:
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Don't cut your front sight base. Get a lo-profile gas block and save your FSB along with the pins. One of these days, you are going to want to sell or do something else with your rifle, and you will be back on here asking for a used FSB and you won't be able to use it because the taper pin holes won't line up, then you will be back asking where you can spend even more money for someone to install a new one. Why? I sold my colt barrel with a shaved gas block the day i posted it on the EE. Many people like a barrel that comes with a pinned low profile block. Why? Because more than one person has posted a thread asking how they can reverse their fuck up. So apparently, not everyone is as lucky as you are. |
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how much do you really think you are going to save? Think about your post.... this obsession with weight on a plastic rifle is borderline absurd. If you can't raise your fully loaded, optic on, A2 buttstock AR with one hand, aim and fire, then saving weight is not your issue. unless of course this is for a woman and then disregard Run 3 miles with a ten lbs rifle in full gear and tell me you wouldnt want it to be lighter. |
| I have to ask, why is it so important to shave weight off of your 6920? What are you trying to do with the AR? As someone else suggested, just look into buying an upper assembly with a lightweight barrel. That is where you are going to shed the most weight - in a lightweight profile barrel. |
| Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? |
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Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. |
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I have to ask, why is it so important to shave weight off of your 6920? What are you trying to do with the AR? As someone else suggested, just look into buying an upper assembly with a lightweight barrel. That is where you are going to shed the most weight - in a lightweight profile barrel. It's no so much about shaving weight on the colt, it is more about my build. If my colt weight 9 lbs and I'm adding a heavier and longer barrel then my build must be at least 10 lbs. but people are claiming to have built a sub 8 lbs rifle with that barrel. |
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A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. Quoted:
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Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. |
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There is so much bad information posted so far i'm not going to begin to tackle it.........
Go here to learn how to make your rifle lighter. I'm not hung up on being ultralight....... but light and reliable is a good thing depending on the rifles intended use. http://www.ar15.com/forums/t_3_118/638524_Lightweight_Parts_List_with_WEIGHTS__AR_15_.html |
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Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. Quoted:
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Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. No Fucking Way You have been mislead. Here is my under 6 pound rifle, and is a 12.5 inch LW profile barrel. Not a goddamn receiver change on the planet will change this. 
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Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. Quoted:
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Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. No, they're not. |
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Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. Quoted:
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Even though this is my first AR and I will probably never sell it, but I'm not going to cut the a2 sight. It's not going to save me any weight. I guess I can ask a different way. Has anyone built rifle with a 16" m4 barrel that weighed less than 7 lbs? If so how did you do it? Has anyone ever built a precision rifle with a 18 inch DMR barrel that weighs under 8? If so how? A Colt 6920 weighs 6.9lbs out of the box. So something is fucked up with your rifle or your scale. Yes it weighs 6.9 lbs with a plastic handguards and iron sights. People are building ARs with the same barrel profile that are under 5 lbs "easily" that have an optic, mount, aluminum handguard, vertical grip, back up sights, sling, ect attached to it. I put an optic,mount, aluminum handgaurd, and a back up sight on my colt at it weighs 9 lbs. Peoples ARs with 18 inch bull barrels don't weight that. There is no way in this world that can happen. I do not know where you are getting that kind of info, but it is complete inaccurate, not to mention dead wrong. I have an A2 lightweight carbine that comes in at 5 lbs. 14.7 oz. without a magazine. I did do a lightweight 18" build using a LaRue Tactical Stealth barrel and a lot of lightweight components and it comes in (without the scope and mount) at 7 lbs. 11 oz. It is a tad over 9 lbs. with the scope and mount. It is also a very expensive build. Most carbines, like the 6920, are going to weigh close to 7 lbs. by the nature of their construction, mainly the barrel. You need to do some serious research and reconsideration. |
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It's no so much about shaving weight on the colt, it is more about my build. If my colt weight 9 lbs and I'm adding a heavier and longer barrel then my build must be at least 10 lbs. but people are claiming to have built a sub 8 lbs rifle with that barrel. Quoted:
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I have to ask, why is it so important to shave weight off of your 6920? What are you trying to do with the AR? As someone else suggested, just look into buying an upper assembly with a lightweight barrel. That is where you are going to shed the most weight - in a lightweight profile barrel. It's no so much about shaving weight on the colt, it is more about my build. If my colt weight 9 lbs and I'm adding a heavier and longer barrel then my build must be at least 10 lbs. but people are claiming to have built a sub 8 lbs rifle with that barrel. Claims are one thing and proof is another. Chances are that they are not including a lot of information along with not providing accurate information. |
My brother has a stag arms M4 model rifle I have a Colt LE 6920 model rifle. When I pick up his rifle it seems very lightweight and easy to point compared to mine, the only difference is his has an aluminum railed gas block on it compared to my standard front site base. I cannot believe how heavy my Colt feels when compared alongside his rifle.
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Unless you're spending money on carbon fiber parts, you aren't getting anywhere close below 5 pounds with optics. I've never even heard of that so whoever is tell you that is offloading a crock of shit.
By far the biggest weight reduction you can do is SBR'ing the rifle and chopping and reprofiling the barrel. |
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I think you might want to stop, and start thinking things over again. You are reading things online that have no basis in reality. 18" heavy barrels don't weight less, and people aren't building kitted out 16" 5lb carbines with optics and rails on a regular basis.
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Thank you everyone! This was the information I was looking for. There is nothing wrong with my brain, well at least this time, people are just full of crap. If it sounds crazy lightweight and you don't see it on scales it's probably a stretch of the truth or an uneducated guess. Watch how fat a 10.5" govt profile sbr with aimpoint r-1 can get. 
add a sling 
add a light and moe shit 
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