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PHL
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How can you tell, or how will you identify a bad quality upper AR receiver? it all looks the same when they are sitting on dealers shelves, and even the dealers are confused on to what brand they have and are selling, since it looks the same, and has no stamp on it. i'm afraid that the defcets or imperfections will be noticeable when I'm already starting to assemble it.Thanks.
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Posted: 8/25/2004 9:10:24 PM EST
Eh..
1) Is it cast? 2) Is it broken? Those should be your main points of avoidance. Past that, there's not much bad out there. God bless mil-spec. |
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Posted: 8/26/2004 5:54:07 AM EST
Tweak has a really good paper on looking at good A2 upper receivers (the receiver only - he doesn't get into the barrel). IIRC its available at www.MD-Ar15.com in the Documents area - Technical Documents folder Click here if you're a MD-AR5.com member and your passport is active
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Posted: 8/26/2004 10:42:07 AM EST
More critical are flattop uppers, as they have a rail designed to accept attachments, and that rail must be fully in-spec for many/most accessories to work. And the tolerances for these rails are very tight, enough to give a few machineshops a big headache. Even worse is the fact that the most critical measurements (the 45 degree angles that make up the clamping area) can't be measured without a gauge that can measure from the angles.
My solution is to buy from a supplier who has a reputation for reliably holding to the specs and has good customer service to handle a problem if I do have one. This policy has prevented me from having a problem in the first place. -Troy |
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