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Posted: 5/30/2014 6:25:18 AM EDT
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I am going my first full AR build, when I got my lower receiver I priced out a couple items at the local shop and compared the prices to online. Guess I was just being cheap, so I bought this, as it was so much cheaper them my local shop:
http://www.ebay.com/itm/330946220053?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 I figured with over 800 sold it must be good. Well it came in the mail yesterday, and it seems to be pretty low quality, the Mil Spec buffer assembly at my local shop looked nice and had a good weight/feel to it, this Ebay on is super light and not the good kind of light its the poor cheap quality kinda lightweight, not to mention its gloss black.. I am not sure if it is normal or not but I am only able to get about 1/4 turn on the buffer tube once its over the buffer retainier pin, if I try to make another full 360* spin it hits the actual retainer pin I am debating should I return it, the seller accepts returns, but by the time I acutally ship it back I wont get much in return. Or should I just keep it and try it out, maybe it wont be so bad afterall? Thanks guys! |
| When you figure in the cost of shipping & ebay fees, your looking at about a $15 kit that from Colt would cost $100 or a BCM Milspec kit would cost about $58. A 6061 tube would cost a few dollars more than that by itself, so I doubt it is even 6061. I would send it back. Even the buffer in my Vltor kit was too soft and the edges were chewed up within 50 rounds. I had to replace it with a BCM buffer and that one is still smooth after 500 rounds. The kit you have may be functional, but how long will it last ? |
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Quoted:
I am going my first full AR build, when I got my lower receiver I priced out a couple items at the local shop and compared the prices to online. Guess I was just being cheap, so I bought this, as it was so much cheaper them my local shop: http://www.ebay.com/itm/330946220053?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 I figured with over 800 sold it must be good. Well it came in the mail yesterday, and it seems to be pretty low quality, the Mil Spec buffer assembly at my local shop looked nice and had a good weight/feel to it, this Ebay on is super light and not the good kind of light its the poor cheap quality kinda lightweight, not to mention its gloss black.. I am not sure if it is normal or not but I am only able to get about 1/4 turn on the buffer tube once its over the buffer retainier pin, if I try to make another full 360* spin it hits the actual retainer pin I am debating should I return it, the seller accepts returns, but by the time I acutally ship it back I wont get much in return. Or should I just keep it and try it out, maybe it wont be so bad afterall? Thanks guys! First lesson is the number of something sold doesn't make it good... Pintos, by example. 800 sold could mean 800 eventual failures at this point. Second the big areas of the need for quality parts in the buffer is the bumper stop & the strength of the material to support the bumper retaining pin. If the material is weak or the bumper fragile there will be a failure. YMMV If the buffer tube engages the retainer lip enough to retain the retainer then it should be OK. There are other tubes that feature a projected lip over the buffer retainer. It is a bit of an anti-rotation feature but that is what the buffer tube notch & end plate alignment knurl is for. It does make sense to have the projection, yet not entirely necessary. |
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It will probably work. 6061vs 7000 series aluminum is not that different. The 7000 will be tougher but most people will never know the difference. You will not be able to notice the diffence by the weight of the tube. The problem with the buffer retainer pin is not uncommon and easy to fix. I like a tube that stops flush or just slightly behind the front face of the buffer tower while containing the buffer retainer pin with about 0.030" clearance between the tube and exposed pin of the retainer pin. The tube has a start point for the threads that is not compatible with the thread start point on the receiver. You are seeing the maximum axial difference one can get with the buffer threads along with the tolerance stack up of the location for the buffer retainer pin. The only way to correct this is to file or sand the buffer shorter on the thread end a couple thousandths. Actually more that that but about half to a 1\3 of a thread shorter. Before you put the file away pin an upper on the lower with the buffer tube and retainer pin installed. Some times the tube will extend forward of the buffer tower enough to interfere with the upper being installed.
Would be interested to see if it's actually die cast then machined, as apposed to billet machined. As i would not be 6061 and you probably could decern a weight difference. Cast buffer tube won't last long. |
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Quoted:
It will probably work. 6061vs 7000 series aluminum is not that different. The 7000 will be tougher but most people will never know the difference. You will not be able to notice the diffence by the weight of the tube. You've learned the number 1 - eBay is full of chinese copies and airsoft crap. Use the EE instead. As for 6061 vs. 7075, someone posted the exact numbers some time back, but it basically works out that 6061 is right at 50% the strength of 7075. For a range shooter, it probably won't matter, and in terms of the function of the weapon, it certainly wont. However, if you want to smack someone in the face with the buttstock or you want to jump and fall on it while dodging live fire, then 7075 would be a valued and welcome spec. Ive not seen 7075 kits below $40, so price is usually a good indicator. That said, I have a 6061 tube on one of my ARs, and as I said, for range use, it's indistinguishable. However, for a SHTF gun, I would not use one... |
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http://www.pkfirearms.com/Stock_Parts__Accessories/12/c
Just get the buffer tube |
| "MILSPEC" is mainly used just to describe the size of the tube for stock fitting purposes. If you want something really durable you need to pay attention to the materials used as others have pointed out. And good luck getting a refund especially if you used eBay/paypal. That's some shady shit. |
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I'd return it and get the BCM stock mounting kit.
http://www.bravocompanyusa.com/Stock-Hardware-Mounting-Kit-Mil-Spec-p/stock%20hardware%20kit.htm |
| I ordered a buffer tube from the same seller optical factory, and it is cheap junk, my buffer wouldn't even fit in the tube, the tube was slightly smaller and my buffer got wedged into it, and I had to cut the tube to get my buffer out, and the seller said that it was my buffer (5oz heavy tungsten filled) and not the tube but I've ran this buffer in two other mil spec tubes and it ran fine.... and I told him I was going to have to cut the tube to even get my buffer out and he said he couldn't do any kind of refund if I couldn't return it in new condidtion and I told him I had to cut it to get my buffer, then he offers that I could send him my buffer and tube with it stuck inside and he would send me one of his buffer kits..... uhhhh no thanks I guess you would do that man..... |
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