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Posted: 8/4/2007 9:21:52 AM EDT
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I am gathering parts right now to build my first upper. I am using a 20 inch RRA varmint barrel and a mega upper. What free float would you suggest? What length do I need? What length gas tube? Anything else I should know before I start my first upper? Thanks for your help! Samuel |
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Do you want a rail for attachments, or just a typical round FF tube? If you want a rail - go LaRue (assuming they will fit over a varmint profile) in 12.0 or 13.2 (covering gas block)  If you dont need a rail - go budget.... get the FF tube from RRA - for $75. If you want middle of the road quality, with a rail, YHM makes some good choices. |
The only drawbacks to the YHM tubes is they are a bit heavier than others (non-issue on a varmint rifle) and they dont have the same quality of anti-rotation mechanisms for rough combat use (again, non-issue for a varmint weapon) They use an aluminum barrel nut, which some dont like... I think they are great for a budget float tube when better/fancier specs are not required for the weapon's deployment. |
Until recently they didn't have any at all. While I agree the anti rotation screws aren't going to be as sturdy as Larue or DD they are better than nothing. |
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this is a dpms tube http://i41.photobucket.com/albums/e292/CHulscher/ar15scoped001.jpg |
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Briley carbon fiber for $70! It's currently on sale and looks great. You need a good strap wrench like the Rigid ($30) to install it. tinyurl.com/37n4v2 I also have the DPMS, but it was a hair too long for my 20" and I had to trim the front sight to get it to really free float. Otherwise it was a fine cheap alternative ($50). |
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