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Posted: 2/5/2014 7:06:12 PM EDT
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Hello,
I am looking to build my first AR, I have never owned an AR and I am trying to learn what I can about them, so take it easy on me  .
I want to build a solid, reliable rifle for hunting, varmint control, and target practice. I have been drawn to the 7.62x39 round for its power, availability, and price. I have done some research and think I have a feasible plan for a decent rifle. If y'all could give me some thoughts and comments that would be great. I don't want to waste money one something that will give problems or fail. I am somewhat aware of the problems with using the 7.62 round in the AR platform, but if y'all have any experience or knowledge regarding this please let me know. I listed the "parts" and URLs below for my planned rifle. • Model “1” Sales 16" C.A.R. 7.62x39 upper - http://model1sales.com/index.cfm?fuseaction=category.display&category_id=308 • BCMGUNFIGHTER MOD 3 Charging Handle - http://www.cheaperthandirt.com/product/2-BCMGUNFIGHTER • Cason Eng. 7.62x39 Chrome Bolt Carrier Group - http://shop.casoneng.com/index.php?route=product/product&product_id=56 • MAG Tactical Systems MG-G4 AR-15 Stripped Lower (Flat Dark Earth) - http://www.cheaperthandirt.com/product/2-CMMGG4FDE • Rock River Arms Lower Receiver Parts Kit with Two Stage Trigger - http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=388 • GuntecUSA AR-15 Predator Six Position Stock with Buffer Tube (Flat Dark Earth) - http://www.cheaperthandirt.com/product/ARR-2512 • Osprey Defense OPS-418 Gas Piston Kit - http://www.3riversprecision.com/osprey-defense-ops-418-mid-length-gas-piston-kit-clone-2.html Thanks, 454_Flatbed |
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You can save several 100's of $ by choosing other suppliers that offer the very same if not better quality than some of the ones on your list. Here are a few suggestions that will save you hundreds (go to their website and you'll find the 7.62x39 parts there): Bolt Carrier Group: A $300 BCG is extremely steep (especially when you see what you can find on a search of Bolt Failure of the brand you are specifying on you tube) Try Armalite or Mas Defense (a relatively new supplier with quality stuff and very reasonable prices) Lower Parts Kit: As a novice, you probably don't need a 2 stage trigger which costs more than double the simple, time-tested PSA (Palmetto State Armory) Classic LPK. It's a great kit for starters or even experienced hands alike. After you hone your skills on that, you can fully appreciate higher level triggers. Gas Piston Kit: Could be a good idea for 7.62, but it's probably not necessary to start off. If you really want to have it, may I suggest the Adams Arms Piston Kit, highly reviewed and a lot better price than the Osprey. Just on the above list alone you can save ~$500 and be at the same or better level than the parts list you provided. Just my $0.02, hope that helps. PS - What's your plan for magazines that will accommodate and properly feed 7.62x39? |
| Stunning parts list for sure. The only thing I don't know about is the piston kit, I have 2 x39 uppers and both are DI. I'd like to see how that piston would work. Like Cali said, you could save some on the build, but this is your gun. Get some ASC mags and go to work. |
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I haven't heard of any problem with the Cason Engineering BCG. They redesigned the bolt for added strength to keep the lugs from shearing off with the 7.62 round, an extended firing pin for Russian primers, plus a chromed carrier. I am not against using a different BCG, but I don't want a failure after 500 rounds. I can add a BCG and charging handle for $140 from Model 1, but theirs is a 5.56 bolt turned down to 7.62.
The gas piston kit is something I will probably do after I've had the rifle in use for awhile, I was just seeing if anybody had comments about it. I think it could help with reliability with the dirty Russian ammo I am planning on using Quoted:
Stunning parts list for sure. The only thing I don't know about is the piston kit, I have 2 x39 uppers and both are DI. I'd like to see how that piston would work. Like Cali said, you could save some on the build, but this is your gun. Get some ASC mags and go to work. What BCGs are you using in your uppers? |
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Quoted:
You can save several 100's of $ by choosing other suppliers that offer the very same if not better quality than some of the ones on your list. Here are a few suggestions that will save you hundreds (go to their website and you'll find the 7.62x39 parts there): Bolt Carrier Group: A $300 BCG is extremely steep (especially when you see what you can find on a search of Bolt Failure of the brand you are specifying on you tube) Try Armalite or Mas Defense (a relatively new supplier with quality stuff and very reasonable prices) Lower Parts Kit: As a novice, you probably don't need a 2 stage trigger which costs more than double the simple, time-tested PSA (Palmetto State Armory) Classic LPK. It's a great kit for starters or even experienced hands alike. After you hone your skills on that, you can fully appreciate higher level triggers. Gas Piston Kit: Could be a good idea for 7.62, but it's probably not necessary to start off. If you really want to have it, may I suggest the Adams Arms Piston Kit, highly reviewed and a lot better price than the Osprey. Just on the above list alone you can save ~$500 and be at the same or better level than the parts list you provided. Just my $0.02, hope that helps. PS - What's your plan for magazines that will accommodate and properly feed 7.62x39? You must have no clue what you are talking about. Do you have any real world experience with the bcg he is talking about. Obviously not. I do. Well worth the money. All my buddies and I have x39 and all their bolts have sheared lugs or ran into some cotostrofic failure at or around 2000 rounds. My cason eng bcg has not had one hickup with over 4000 rounds now. There bcg is stainless steel 17-4 the hardest aerospace stainless steel wich is a lot harder than carborized steel without it being brittle. Also it's a lot harder to machine wich I'm sure is a price factor. I btw... Please refer me to your youtube sites that say other wise. Thanks |
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I would get the following:
YHM 7.62X39 marked upper YHM barrel of your choice YHM Flash hider/muzzle brake/suppressor mount of your choice (1X36) YHM gas block (or any good low pro gas block) Melonite gas tube Cason Engineering BCG Handguard of your choice (9 or 10" to cover the gas block) Spikes LPK Above is a good starting point. I am currently building a 7.62X39 SBR using YHM barrel and upper, MI 10" Gen2 Handguard, and will be going with the Cason BCG. You picked one of the best BCG on the market as they are designed specifically for 7.62X39. I would stay away from Model 1 as they are hit and miss plus an unknown lead time. Also piston set up is not needed and may cause further problems. |
| I love my 7.62x39 rifle. Getting mags that work well is the hitch with these rifles. I like my C Products mags. They work well. DI system is fine, unless you're dead-set on a piston system, You can save some $$$ there. I wouldn't mess with Model 1 sales. Huge backlog and very hard to get ahold of, in my experience. I love my Cason bolt and enhanced firing pin, no issues with hard primers and I didn't need heavier springs in the FCG. Brad is very helpful. His service and products are top notch as well. YHM barrels are very popular, and from what I can tell have no real issues. I picked up an ARD heavy barrel from GunBroker and it's worked well. My build thread is HERE. Good luck with your build. Keep us posted and throw a picture into the 7.62x39 pic thread when you're done!!!! |
| Cason engineering bcg with enhanced firing pin and YHM barrel 4000rounds + running like a champ. The gun is very accurate. I like the cason bcg a lot because the hard chrome on it cleans very easily and after all these rounds hasn't sheared or broke any lugs and doesn't even have a mark on it. I'm trying to put it to the test |
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What do y'all know about SOTA barrels? I can get a 16" chrome lined, fluted, and threaded YHM barrel for $194.20 (sold out at JSE Surplus), or a 16" threaded stainless SOTA barrel for $164.98 (available?). A 16" threaded stainless Stoner from Midway is $299, a big price difference!
Here is one I stumbled onto, it's from Cobra Tactical Systems. http://www.cobratacsystems.com/products/ar-15-7-62-39-x-16-stainless-416-h-bar-straight-fluted-barrel-750-gas-block-dia |
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Welcome to ARFCOM! Model 1 is @ most of the D/FW area gun shows - there's 2 later this month. Don't know what their stock of 7.62x39mm uppers is.
This is the piston kit that intrigues me, b/c it's long stroke: http://tnwfirearms.com/conversion-kits/tnw-retro-fit-gas-piston-system.html |
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Quoted: You must have no clue what you are talking about. Do you have any real world experience with the bcg he is talking about. Obviously not. I do. Well worth the money. All my buddies and I have x39 and all their bolts have sheared lugs or ran into some cotostrofic failure at or around 2000 rounds. My cason eng bcg has not had one hickup with over 4000 rounds now. There bcg is stainless steel 17-4 the hardest aerospace stainless steel wich is a lot harder than carborized steel without it being brittle. Also it's a lot harder to machine wich I'm sure is a price factor. I btw... Please refer me to your youtube sites that say other wise. Thanks Quoted: Quoted: You can save several 100's of $ by choosing other suppliers that offer the very same if not better quality than some of the ones on your list. Here are a few suggestions that will save you hundreds (go to their website and you'll find the 7.62x39 parts there): Bolt Carrier Group: A $300 BCG is extremely steep (especially when you see what you can find on a search of Bolt Failure of the brand you are specifying on you tube) Try Armalite or Mas Defense (a relatively new supplier with quality stuff and very reasonable prices) Lower Parts Kit: As a novice, you probably don't need a 2 stage trigger which costs more than double the simple, time-tested PSA (Palmetto State Armory) Classic LPK. It's a great kit for starters or even experienced hands alike. After you hone your skills on that, you can fully appreciate higher level triggers. Gas Piston Kit: Could be a good idea for 7.62, but it's probably not necessary to start off. If you really want to have it, may I suggest the Adams Arms Piston Kit, highly reviewed and a lot better price than the Osprey. Just on the above list alone you can save ~$500 and be at the same or better level than the parts list you provided. Just my $0.02, hope that helps. PS - What's your plan for magazines that will accommodate and properly feed 7.62x39? I btw... Please refer me to your youtube sites that say other wise. Thanks Relax dude, I didn't mean to insult your Bolt Carrier Group. All I said was the price is steep, and at $300, it obviously is. Anyway about the video, just search it on YouTube, his unit failed at 1k rounds. Don't get mad, it's just one guy. And yes, yours lasted past 4k rounds, ok I got it. |
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Quoted:
What do y'all know about SOTA barrels? I can get a 16" chrome lined, fluted, and threaded YHM barrel for $194.20 (sold out at JSE Surplus), or a 16" threaded stainless SOTA barrel for $164.98 (available?). A 16" threaded stainless Stoner from Midway is $299, a big price difference! Here is one I stumbled onto, it's from Cobra Tactical Systems. http://www.cobratacsystems.com/products/ar-15-7-62-39-x-16-stainless-416-h-bar-straight-fluted-barrel-750-gas-block-dia I just ordered my second 762X39 complete SS upper from SOTA for $480 delivered (3-4 week wait?) These are a complete assembled 16" stainless steel barrel upper ready to be attached to a lower. They have the regular steel barreled version for $30 less. SOTA 7.62 stainless $480 |
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Quoted:
Bolt Carrier Group: A $300 BCG is extremely steep (especially when you see what you can find on a search of Bolt Failure of the brand you are specifying on you tube) Try Armalite or Mas Defense (a relatively new supplier with quality stuff and very reasonable prices) Can you post a link to the youtube video? The only one I found was for a guy that broke a Model 1 sales bolt and replaced it with a Cason bolt. |
| For my X39 build, I used a 5.56 carrier from a RRA BCG and ordered a bolt a firing pin from Rubber City Armory... I've only run about 30 rounds though the gun, just test firing... It has fired every time and ejected everytime with no issues.... I just now got my ASC mags squared away and it feeds smooth too.... |
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Quoted:
I would get the following: YHM 7.62X39 marked upper YHM barrel of your choice YHM Flash hider/muzzle brake/suppressor mount of your choice (1X36) YHM gas block (or any good low pro gas block) Melonite gas tube Cason Engineering BCG Handguard of your choice (9 or 10" to cover the gas block) Spikes LPK Above is a good starting point. I am currently building a 7.62X39 SBR using YHM barrel and upper, MI 10" Gen2 Handguard, and will be going with the Cason BCG. You picked one of the best BCG on the market as they are designed specifically for 7.62X39. I would stay away from Model 1 as they are hit and miss plus an unknown lead time. Also piston set up is not needed and may cause further problems. This would be a nice build |
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Quoted:
This would be a nice build Quoted:
Quoted:
I would get the following: YHM 7.62X39 marked upper YHM barrel of your choice YHM Flash hider/muzzle brake/suppressor mount of your choice (1X36) YHM gas block (or any good low pro gas block) Melonite gas tube Cason Engineering BCG Handguard of your choice (9 or 10" to cover the gas block) Spikes LPK Above is a good starting point. I am currently building a 7.62X39 SBR using YHM barrel and upper, MI 10" Gen2 Handguard, and will be going with the Cason BCG. You picked one of the best BCG on the market as they are designed specifically for 7.62X39. I would stay away from Model 1 as they are hit and miss plus an unknown lead time. Also piston set up is not needed and may cause further problems. This would be a nice build Im gathering parts now, what mags are working, So I can keep an eye out for them |
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Quoted:
Thanks for you reply! Have you had any problems with headspace using the YHM barrel and upper? I had a guy tell me he wouldn't assemble an upper because of the headspace, but I have read that it's not a problem when buying factory barrels. guy know not of what he speaks. The AR barrel will come w/ the "barrel extension" permanantly attached to the barrel at a non-adjustable headspace. This slides into the front of the upper and is secured w/ the barrel nut which threads onto the upper receiver. But first tiem I fire a gun, I hold it at arms length and look away in case the headspacing of the barrel unit and the bolt dont' like to play 
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