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JoeGSX
12-12-2011, 10:10 AM
So im going to start building my upper. Would you guys recomend a upper receiver vice block or a the upper action block to hold it while torqueing it down?

Thanks
Joe

FeuerFrei
12-12-2011, 10:22 AM
Barrel vice block

dieselpower
12-12-2011, 10:36 AM
clam shell

about half-way down the page (http://www.bushmaster.com/products.asp?cat=15)



Bushmaster Armorer's Action Clamp for all AR15/M16 type rifles
This Action Clamp works with all models of AR type rifles (even early A1's), including the popular A3 "flat-top" Upper Receiver - even when the Carry Handle is in place. Used in conjunction with an Armorer's Barrel Wrench (available from our Catalog or Website), it eliminates barrel vise jaw blocks for removing or replacing barrel assemblies, and is necessary when installing tubular aluminum V Match handguards or competition free-floating tubes.

steve92407
12-12-2011, 11:26 AM
ma parts upper clamp vice $30 .

baih777
12-12-2011, 2:45 PM
you need a action block to install the barrel
http://www.midwayusa.com/product/310152/promag-armorers-upper-and-lower-receiver-action-block-set-ar-15

if your going to build more in the future you might want to consider this.
http://www.jsesurplus.com/artoolbundle.aspx

i bought one this year and i am very pleased with it. it does not include a tool for all the different types of handguards. free floating handguards require a strap wrench. i use this one.
http://www.homedepot.com/h_d1/N-5yc1v/R-100057622/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

also to install or change a muzzle brake/flash hider you will need a barrel vise or clamping block like this
http://www.midwayusa.com/product/608967/dpms-barrel-vise-jaws-ar-15-aluminum

digdug74
12-12-2011, 5:15 PM
Clam shell type block. I used the other type (action block w/pins) for my first upper build and think I tweaked/twisted the receiver while torquing down the barrel. Probably best to stay away from those for barrel work.

Don29palms
12-12-2011, 6:01 PM
This one works great for flat top uppers.

http://www.lancotactical.com/catalog/product_info.php?cPath=37&products_id=116