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Posted: 2/21/2005 3:55:20 AM EDT
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I would like to get a handle on the specialty tools necessary for my first build of an ar-15 upper. I have basic tools, including a punch set. Please advise on what tools are necessary, and any additional tools that are highly recommended. Required tools: action block and insert DPMS wrench (seems to be the best one) Do I need: go, no go and field guages? torque wrench? any tools for roll pins? Did I miss anything? Thanks for any advice. |
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Bushmaster armorer's action block DPMS armorer's tool Torque wrench optional. The barrel nut goes on hand tight, then simply tighten until the gas tube lines up. I use a torque wrench just to make sure I am not going over 80 ft/lb. headspace guages are optional. Barrels are headspaced at the factory when the barrel extension is put on the barrel. Unless you are buying used barrels/bolt carriers/bolts, I would probably pass on the headspace guages. But they are a nice thing to have. Complete punch set. But you already have a set. A regular punch set and roll punch set are a nice thing to have. Adjustable hook type spanner wrench. If you plan to install a Yankee Hill Machine (YHM) free float tube. The Jamb nut requires the use of this tool, do not use a hammer and screwdriver. YHM sells a specialty tool for about $30, but I got a J.H. Williams adjustable hook spanner wrench off ebay for $10. 3/4" wrench for the flash hider. A boresighter. Nice thing to have to make sure the barrel and the sights are looking at the same thing. As you torque the barrel nut down, the index pin can have enough play to let the barrel turn a very small amount. This will in turn rotate the FSB causing your sights to be off. Best thing to do is to boresight the barrel for sight alignment, and then have a buddy hold the barrel in the proper position while you tighten the barrel nut. NECO moly disulfide paste. It acts as an anti-seize agent between the barrel nut and the upper receiver. When you order the action block from Bushmaster, just get it. The moly content is about 60% and contains no teflon. The moly grease/moly anti-seize compounds you get in auto parts stores has a much, much lower moly content and some contain teflon. That's all I can think of off the top of my head. |
| If your going to get the moly-slide and action block from Bushmaster, I believe Bushmasters NEW barrel wrench can now compete with DPMS's for quality and value. (If you want to save some shipping). Hopefully FALARAK's post on Building an upper get's Re-tacked. The information is super and I wish I would have printed it. |
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