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Posted: 11/13/2012 10:31:58 AM EDT
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Reading another thread that showed several upper receiver blocks of different design has raised a question in my mind.
I bought the Brownell's essential AR tools kit that includes blocks for both upper and lower receivers that can be clamped in a vice to keep both hands free for assembly or disassembly. There is, in addition, an insert that substitutes for the bolt carrier group and provides extra support for the upper receiver. How do the Brownell's blocks stack up against the other types? I used mine to install a YHM barrel on a CMMG upper and all went smoothly but I'd like to hear from others who have used the Brownell's fixtures. |
| No first hand experience with Brownells but figure I would chime in anyways. I used these for the first time last night and they worked out very well. |
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No first hand experience with Brownells but figure I would chime in anyways. I used these for the first time last night and they worked out very well. Those blocks look very similar to the Brownell's block with the exception that the Brownell's block is hinged rather than two separate pieces. Thanks for the quick reply. |
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Quoted: How do the Brownell's blocks stack up against the other types? I used mine to install a YHM barrel on a CMMG upper and all went smoothly but I'd like to hear from others who have used the Brownell's fixtures. they rock and the hold the upper "all around" vice just the take down pins Idiots who use the takedown pin "blocks" don't realize those are made for cleaning/dicking with the upper, NOT replacing the barrel/muzzle device. |
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How do the Brownell's blocks stack up against the other types? I used mine to install a YHM barrel on a CMMG upper and all went smoothly but I'd like to hear from others who have used the Brownell's fixtures. they rock and the hold the upper "all around" vice just the take down pins Idiots who use the takedown pin "blocks" don't realize those are made for cleaning/dicking with the upper, NOT replacing the barrel/muzzle device. I use the "clamshell" type receiver blocks as well - but as a minor note - in order to work with uppers that have an anti-rotational FF barrel nut or locking system like the DD RIS II, you will need to relieve the receiver blocks, as they typically close right at the end of the receiver. Takes under five minutes with a Dremel to do, but you may as well be aware. ~Augee |
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How do the Brownell's blocks stack up against the other types? I used mine to install a YHM barrel on a CMMG upper and all went smoothly but I'd like to hear from others who have used the Brownell's fixtures. they rock and the hold the upper "all around" vice just the take down pins Idiots who use the takedown pin "blocks" don't realize those are made for cleaning/dicking with the upper, NOT replacing the barrel/muzzle device. The pin blocks used in the vertical position are for cleaning and maintenance. Used in the horizontal position they are for barrel nuts. They only work on flat top uppers. I would not mount the upper to remove or install a muzzle devise. A barrel clamp is a better option. |
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Quoted: If you are using them to hold the upper "horizontal" the pins will still get the stress.The pin blocks used in the vertical position are for cleaning and maintenance. Used in the horizontal position they are for barrel nuts. Using the pins for anything except cleaning is dumb. |
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If you are using them to hold the upper "horizontal" the pins will still get the stress.
The pin blocks used in the vertical position are for cleaning and maintenance. Used in the horizontal position they are for barrel nuts. Using the pins for anything except cleaning is dumb. They do not. In fact you don't even have to use the pins. The block supports the bottom rail of the upper and the vise jaw supports the top rail of the upper. There is zero stress to the pivot and takedown pin blocks. Anyone that cannot see this is dumb. |
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CLICK
I bought these for a whoping $12 and it works great, I will however have to find something else to mount the barrel to my new A2 build though as these only work on flat tops. |
| I installed a 6.8 barrel last night using the blocks with the cut outs for the upper lugs and the slide on block for the upper rail of the flat top receiver. Simply install the upper into the block recesses and clamp the lower block in the vise, slide the upper block on and use a LARGE Crescent wrench to hold back against yourself as you're tightening the barrel nut. Works perfectly and no strain on the pin lugs. |
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How do the Brownell's blocks stack up against the other types? I used mine to install a YHM barrel on a CMMG upper and all went smoothly but I'd like to hear from others who have used the Brownell's fixtures. they rock and the hold the upper "all around" vice just the take down pins Idiots who use the takedown pin "blocks" don't realize those are made for cleaning/dicking with the upper, NOT replacing the barrel/muzzle device. Only idiots repeat myth they read on the internet without any real world expierence!!!!! 
People that claim they have damaged their upper receivers by using these blocks didn't know what they were doing and they should have stopped before going into roid rage on the 6 ft breaker bar in their hand. The clamshell devices work but they don't work for all uppers without taking a dremel to them. The link above to the one on Ebay looks interesting I may order a set. Right now I am using the Squirrel Daddy receiver blocks and they work fantastic. I have used these extensively on all my friends AR's as well. Never any damage, but you have to know what you are doing. There was a thread on another forum where a member destroyed his upper by trying to remove a muzzle device that was pinned and welded in place. He didn't know and didn't understand why it didn't break loose so he gets a breaker bar and lays it to it. Instead of it breaking FREE, it just broke. Here's your sign!!!!! peole will read a thread like this and then post a comment like the dude above and BINGO Internet myth is born!!!!
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I don't use an upper clamshell/ block at all. I use barrel blocks for installing both the upper and muzzle devise. you can make a set out of strong hardwood (...oak...)very easily.
advntrjnky Quoted:
Has anybody made an upper holder out of wood? I would like to avoid the expense of a store bought unit just to mount a barrel on my slick side flattop. Sorry if this has been discussed. |
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CLICK I bought these for a whoping $12 and it works great, I will however have to find something else to mount the barrel to my new A2 build though as these only work on flat tops. This looks like it will work, but if your carfull, I bet you can crush the upper. |
| I bought This from spikestactical.com and it works great for assembling and dis-assembling uppers. |
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