Home CMMG AR-15 Freefloat Quad Rail Installation

AR-15 Freefloat Quad Rail Installation

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Here’s some video of the Firefield Carbine Free-float quad rail installation.

It’s a good system, with a solid feel and gives a lot of room for accessories.

Thanks for watching, and please remember to “like” the videos.

Highlights

00:10 Package Contents
02:15 Clamping upper in vise
02:45 Removing flash hider
05:30 Removing the front sight tower pins
07:15 Removing the front sight tower
08:25 Barrel nut removal tool
09:40 What isn’t shown
09:50 Do NOT use locking agents
09:56 Another set of hands
10:13 Smart-ass wife…
10:30 Removing the barrel nut (for real this time)
11:05 Installing the free float barrel nut
12:33 Torque specs
13:51 Putting the free float on
15:10 Checking gas tube/carrier key alignment
15:22 Strap wrench on float tube nut
16:07 Why a free float tube?
16:45 Timing the A2 flash hider

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28 COMMENTS

  1. I am glad I found this video I found this same free float for my better half on eBay for 16$ roughly. had no instructions at all and was wondering what the hell the 2 little dowel pins were used for . was going to leave them out but you and YouTube have saved me from embarrassing moments and my better half from being blown off thumbs up!

  2. I have been using this video to remove my front sight and it was perfect,but i need to ask a question.If i put a small gas block block on mine could i use any size free floating rail or does it have to be the same size hand guard I have on now which is 7 in.
    Thank's

  3. This is an odd one, but whenever I add the little pins into the barrel nut, the rail as a whole goes up at an angle. When they are not there, this doesn't happen. Think anything will happen if I just leave those out?

  4. Great video and thanks for taking all that time and trouble to post it! I spent more than 30 years battling with loctited parts while working in the automotive field. A friend of mine let me in on the secret of getting loose those loctited screws on Japanese transmissions and used this method of getting them loose from then on. All I can say is "try it, you're gonna love it." Just heat it for just under 5 seconds with a propane torch before attempting to loosen it. Like I said, great film and Thanks!

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