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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 01-12-2019, 9:35 AM
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Default Buying someone else's build?

What do you guys think about buying someone elses AR build? I see good deals on the marketplace sometimes but have been hesitant to buy someones build for some reason. Is there any reason I shouldn't? Assuming I check out the gun and it appears to be fine?
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Old 01-12-2019, 9:41 AM
daorozco86 daorozco86 is offline
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I wouldnt unless they took it to the firing range for a 100 round various mag test.
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  #3  
Old 01-12-2019, 10:13 AM
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Depends on the price and what you're getting for it, but there's nothing wrong with it. If you're buying a build because you don't want to do basic elementary AR assembly, then you should just buy something from the factory with a warranty, or at least a complete upper and complete lower. If you're buying a build because you want to save money but can do basic AR repairs if need be, then it can be a good option.

I got an Aero 308 lower with a SSA-E. The guy I bought it from, a Calgunner with extensive military experience and a large gun collection, put a bunch of things on wrong (wrong weight for the buffer, wrong takedown/pivot pins) that I had to fix. Still a good deal at the time (prices on lower and 2 stage triggers have plummeted since, but hindsight is 20/20.)

I bought a factory Aero upper from one of the marketing guys at Aero via Armslist. The gas block wasn't attached properly and eventually came off after relatively limited use, making the rifle into a bolt action effectively. I don't even know how to explain this since it wasn't a homebuild. Rocksett and a screwdriver fixed it (yes, pinning it would be better.)

I also bought a complete AR from another calgunner. The handguard wasn't properly mounted and would rotate. Again, no problem that a screwdriver and loctite didn't fix.

All of these people who sold AR to me were "gun guys" and very good, honest people, so if you buy an AR without a warranty, be ready to have to do a little basic work on it. In fact, when you take it home, I would check for various common points of failure. Specifically, I would check to see:

1. Is the gas block securely attached? Pin it or have a gunsmith pin it and if not going that route at least make sure it is properly torqued with rocksett (there's a ton of heat in that area, so loctite is not the right product.)
2. Is the castle nut properly attached? That usually means torqued to 40 ft-lbs. Staked if you're planning on heavy use.
3. Do a function test to make sure the trigger/reset properly works. Sometimes people install the trigger backwards, which again makes your rifle a bolt action.
4. Is the handguard securely attached to the upper? If not, won't cause a failure to go boom, but will mean you won't be able to shoot with any reasonable accuracy.
5. If you have a muzzle brake, are the ports properly oriented?
6. Is the bolt carrier gas key staked?

For safety reasons, you should also test with go/no-go gauges with any non-factory build before use.
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Last edited by Califpatriot; 01-12-2019 at 10:31 AM..
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  #4  
Old 01-12-2019, 10:15 AM
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just like anything used, you can get a score or a lemon....

but ARs are a dime a dozen now, and I can build my own, cheaper than trying to buy someone else's home build -- a factory built rifle might command a little premium, but ARs are still a dime a dozen
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  #5  
Old 01-12-2019, 10:23 AM
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Although I've never purchased one myself, I think that if you know what you're looking for, the price is right, and it has all of the parts you want, I would be 100% fine with buying someone else's build.

But I guess that's also the reason I've never purchased someone else's build, is because I've never been able to find one that meets my needs/wants. However, if I did, I would definitely tear it down and re-install everything just to make sure it was built correctly.
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  #6  
Old 01-12-2019, 10:32 AM
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it is really difficult to mess up an AR build if you use parts from reputable manufactures.

a good barrel pretty much prevent 90% of the common problem


i built the ar in my signature. never had any problem.
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Old 01-12-2019, 10:34 AM
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Most of my ar's are assembled by me over the last 20 plus years.
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  #8  
Old 01-12-2019, 10:36 AM
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Legos... plug and play ... if something doesnt work or you dont like, just replace it. Build numerous from some new or some old, they all run well.
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  #9  
Old 01-12-2019, 6:07 PM
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I did buy a build from a cal Gunner on here. It was a complete aero precision lower and it had a PSA upper. I've never had any issues with it and it runs flawlessly.
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  #10  
Old 01-13-2019, 6:55 PM
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I wouldn't do it, mainly because I'd be afraid the previous owner was a froglube user!
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  #11  
Old 01-13-2019, 7:00 PM
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You could always buy it, tear it down, rebuild it, and test it. Then you would know exactly how it is assembled....
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Old 01-13-2019, 7:00 PM
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Id buy it like I was building it. I'd assess the sum of parts, do an inspection as it is used, less the used discount.
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  #13  
Old 01-13-2019, 7:24 PM
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If it has a reputable upper there is very little risk of a problem. Now if they built the upper that's a different story. Still, an AR is hard to screw up unless your an idiot and yes, there are a lot of idiots out there.
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  #14  
Old 01-13-2019, 10:43 PM
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Over many years of reading various poster's examples of having problems with their newly assembled AR clones I would most certainly take a pass. Hell no. Nope. Never.
Plus I have seen too many Gomered AR's that looked like they were put together by a blind nutless monkey.
So, NO!
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  #15  
Old 01-14-2019, 12:13 AM
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just check the parts,and fitting.
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  #16  
Old 01-14-2019, 12:22 AM
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I saw an ad on another site for a used AR pistol. The SB/Maxim brace was installed upside down. If you know how to inspect an AR for proper assembly or will pay a gunsmith to do so, nothing wrong with shopping for a used AR.
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  #17  
Old 01-14-2019, 1:06 AM
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But...it's CUSTOM!
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  #18  
Old 01-14-2019, 5:50 AM
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Never had a bad one yet ,in any form of firearm.I think most people here do not want to sell you something that does not work ..
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  #19  
Old 01-14-2019, 6:54 AM
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Quote:
Originally Posted by ZX9ALLDAY View Post
Legos... plug and play ... if something doesnt work or you dont like, just replace it. Build numerous from some new or some old, they all run well.
This!
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  #20  
Old 01-14-2019, 7:32 AM
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No thank you. If I was looking for something other than a milspec factory gun from a reputable company, i’d build it myself with the parts i wanted.


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  #21  
Old 01-14-2019, 7:52 AM
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I'm not an AR guy, but I have bought 2nd hand for over 50 years. When buying anything used, consider it used parts, and price it accordingly..
Also, assume something's not right even if it's not apparent. Same reason buying and shooting reloaded ammo is frowned on unless the plan is to disassemble for components, and for that reason you buy it on the cheap. Like I stated I'm AR challenged, but from following some of these threads out of curiosity I do know that an AR DNA can be widely different from one gun to the next. Different manufactures, different styles, different calibers, different parts, triggers etc..etc... Too confusing for this guy. Also, a used AR is built to individual taste and preferences. What works for one may not for the other. Someone advised that buying a generic from a major manufacture might be a better way to go. I agree. If something does go wrong you have back up, otherwise you're on your own for someone else's mistake.... IMHO
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Old 01-14-2019, 9:44 AM
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I've sold several that I put together, basic M4 style in the $475-$500 range, never had one complaint of any issues, infact I need to sell a couple more right now. I use mostly barreled uppers form PSA, but I've built a few up also, and all the AR's ive put together for myself and family members as well, never had a single functioning issue.

Only issue I've ever had with an AR is Mag issues.
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Old 01-14-2019, 9:52 AM
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Ar's are so cheap these days I'd feel much better just buying a new name brand rather than something someone else put together.

It's a buyer's market these days for new AR's.
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Old 01-14-2019, 10:36 AM
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"Someone else's build" covers a very broad range of possibilities. Does putting a complete lower with a complete upper = a build?

Unless a barrel to receiver install and gas block install were involved, everything could be easily disassembled, verified, and reinstalled.
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Old 01-14-2019, 10:49 AM
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Yeah it depends on what kind of "build". BUT AR's are not exactly like LEGO's. LEGO's are HARDER.

I'd try to pin down WHY THEY ARE SELLING IT. I don't want to buy a reject or the worst of the bunch. Ya know?
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Old 01-14-2019, 10:51 AM
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Quote:
Originally Posted by brianm767 View Post
I've sold several that I put together, basic M4 style in the $475-$500 range, never had one complaint of any issues, infact I need to sell a couple more right now. I use mostly barreled uppers form PSA, but I've built a few up also, and all the AR's ive put together for myself and family members as well, never had a single functioning issue.

Only issue I've ever had with an AR is Mag issues.
So let me ask a hypothetical question. If someone were to get injured while shooting one of your AR's and slaps a law suit on you.. hey God forbid, but ***** does happen... are you prepared to weather the legal storm?? Or on the flip side is someone shooting one of your AR's ready to except the blame for a possible life altering injury they are not directly responsible for?? I know it's a rarity, but as a manufacturers rep I've had to deal with a couple of firearm related injuries in the past....
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Old 01-14-2019, 1:41 PM
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Quote:
Originally Posted by condor View Post
So let me ask a hypothetical question. If someone were to get injured while shooting one of your AR's and slaps a law suit on you.. hey God forbid, but ***** does happen... are you prepared to weather the legal storm?? Or on the flip side is someone shooting one of your AR's ready to except the blame for a possible life altering injury they are not directly responsible for?? I know it's a rarity, but as a manufacturers rep I've had to deal with a couple of firearm related injuries in the past....
Yes it is something to consider, but I think anyone here who's ever sold a firearm could possibly find them selves in the same position, did you ever disassembly it and reassemble it, break it down clean it and reassemble it? But I do see the risk is higher in this situation. Thats the reason I mostly use barreled uppers from reputable manufactures such as PSA, Delton or others, I am building these rifles for my self or my kids or family members to shoot so I want to be safe, but if there is a failure which causes an injury to myself or someone else, it would most likely caused by the barrel assy/upper receiver, but yes it still could end up in a legal mess having to prove it wasn't me putting the barreled upper on the lower, it was your reloads or what ever. I dont think any one of us is prepared for that. I wouldn't be building up M1A's or Garands, but an AR, yes, I'll keep building them for myself, and the ones I occasionally choose to not keep when I get bored of them, Ill sell them off.

Last edited by brianm767; 01-15-2019 at 7:09 AM..
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Old 01-14-2019, 1:57 PM
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^^^^^^ One more reason to justify my refusal to sell any of my guns ....

:-)
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Old 01-14-2019, 2:01 PM
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Quote:
Originally Posted by condor View Post
So let me ask a hypothetical question. If someone were to get injured while shooting one of your AR's and slaps a law suit on you.. hey God forbid, but ***** does happen... are you prepared to weather the legal storm?? Or on the flip side is someone shooting one of your AR's ready to except the blame for a possible life altering injury they are not directly responsible for?? I know it's a rarity, but as a manufacturers rep I've had to deal with a couple of firearm related injuries in the past....
Get good umbrella insurance?

Also, strict liability doesn't apply to casual/occasional sellers.
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Do you have a CZ PCR or P-01, a Kel-Tec P-11, a WASR, a fixed mag Draco, or a gen 2 or 3 PSAK-47? Let me know as I may be interested in buying or trading for those.
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Old 01-14-2019, 5:22 PM
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Quote:
Originally Posted by Califpatriot View Post
Get good umbrella insurance?

Also, strict liability doesn't apply to casual/occasional sellers.
Personal liability is covered by an umbrella or blanket policy. If a gun is made for resale it might be construed as a business... I bet a lawyer would have a lot of fun with that one.. :-)
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