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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/15/2005 2:51:58 PM EDT
I've read here on this forum that one can make a cheap action block substitute can be made using a magazine filled with epoxy (or whatever), or by using a 1x3 block of wood. This would certainly be adequate for holding a lower while assembling a LPK, but is it strong enough to use for assembling a barrel onto an upper receiver? Thanks in advance for input.
Link Posted: 8/15/2005 4:34:08 PM EDT
I would advise against using anything that locks in the magazine well for rebarreling an upper.
Link Posted: 8/15/2005 4:35:16 PM EDT

Originally Posted By M4Madness:
I would advise against using anything that locks in the magazine well for rebarreling an upper.



I second that!

Danny
Link Posted: 8/15/2005 7:39:47 PM EDT

I would advise against using anything that locks in the magazine well for rebarreling an upper.


+1,000

Buy an action block set, it's worth every penny, even if you only use it once!
Link Posted: 8/15/2005 7:48:26 PM EDT
When building my uppers, I often pad the upper with a towel and clamp *gently* with a vise. Unless you're a brainless brute, you won't crush the upper; just the same, though, I insert a bolt carrier for extra safety. Closer to 7 or 8 (dis)assemblies now, with no problem.

Past that, I'm sure any of the Hometown folks would be glad to help.
Link Posted: 8/18/2005 2:29:38 PM EDT
I have found "heat" and "freeze" to work awesome. Used a sledge hammer one time, that worked kinda good, hmm hacksaw works great, all time best tool to hold an upper was done to me on my first AR-15 by a gunsmith, the put the barrel in a vise with no "barrel" jaws, just a vise and took the factory barrel nut off my Colt that I had for maybe 2 weeks, anyway he twisted the barrel extention this way and scratched the crap out of my barrel, That right there made me buy my own wrench and upper thingy.
Link Posted: 8/19/2005 8:29:35 PM EDT
Link Posted: 8/20/2005 9:59:10 AM EDT
Action block $35, new upper $115. Do the math!

I learned the hard way, when a new RRA upper was only $90 shipped.
Link Posted: 8/20/2005 11:30:32 AM EDT
lay it on the floor and lean into the wrench!
sheeesh...
Link Posted: 8/20/2005 8:23:07 PM EDT
How good is the DMPS Upper Reciever Block is it as good as the NSN 4933-01-494-6732 Upper Receiver Actiob Block or better?
Link Posted: 8/20/2005 9:12:55 PM EDT
Is the DPMS the whitle Delrin model with the two pins? If so, that's the one I prefer.
Link Posted: 8/21/2005 11:30:47 AM EDT
[Last Edit: 8/21/2005 11:36:29 AM EDT by WILDBILL756]
Yes, the DPMS is the White plastic model with the two pins. I have never have use anyone. I Didn't know which one is the best to use. I have been thinking that the Military one NSN 4933-01-491-6732 Upper Receiver Block might be better. But, I could be wrong.
Link Posted: 8/21/2005 2:34:55 PM EDT
Well, I love the DMPS one I 've got...I even used it on my DMPS .308 yesterday am to break down the upper so I could send the barrel out for some work.

The clamshell type will not work on DPMS or RRA uppers that have raised rails. If you think you'll *never* need to do work on these, go ahead and get the clamshell. My thought is, if the white delrin works on EVERYTHING, why limit yourself with the clamshell type?

I had the clamshell one, but sold it after the first time I used the DPMS...I couldnt' see any reason to keep it.

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