We have compiled some great videos that show how to install AR 15 parts and accessories including free float quad rail handguards, triggers, and more. Browse through the videos and use them as your guide to building your AR-15. If you have questions, please do not hesitate to contact us. Installing an aftermarket free-float rail system to your AR-15 can be a great upgrade, as one of the primary benefits is that it installs to the upper receiver and doesn’t make contact with the barrel at all. This works on free float handguards with 4 holes to secure the end cap using the supplied screws. Will work on some Yankee Hill Machine quadrails And Midwest Industries quadrails, but only types with non-threaded front end, Weight: 1oz. In addition, depending on the AR15 free float tube you choose, you might need a special float tube wrench. I opted to get this from YHM, didn't need it, but since this was my first one, couldn't hurt.
- Utg Free Float Quad Rail
- Ar 10 Free Float Quad Rail
- Free Float Quad Rail
- Ar 15 Free Float Quad Rail Install
- Product Family #: 1003219949
- Product #: 175917
- DPMS #: F411047
- UPC #: 197706175917
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Utg Free Float Quad Rail
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Product Overview
Aluminum anodized free float handguard tubes with four Weaver-Style, Picatinny rails. Vented for improved cooling and 'indexable' for correct positioning. Black.
Specifications
Product Information
Ar 10 Free Float Quad Rail
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Delivery Information
Free Float Quad Rail
| Must Ship to FFL Dealer | Yes |
| Shipping Weight | {{selector.shippingWeightDisplay()}} |
| Ships Alone | Yes |
| Oversized | Yes |
| DOT- Regulated | Yes |
| Carrier Restrictions |
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| HazMat Product | Yes |
Customer Reviews
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Update Your Browser Now!NOTE: Prices, specifications and availability are subject to change without notice. We reserve the right to correct typographic, photographic and/or descriptive errors. Ar 15 Free Float Quad Rail Install
I'm at the end of my first build. I am working with a Rock River Arms Forged A4 Upper Receiver, a Spikes Tactical ST- FN Cold Hammer Forged 14.5 Mid-Length Barrel, and a LaRue Tactical Handguard FULL LENGTH LT15-11FL. I had originally installed a MI MCTAR-21G2 but it was short of the gas block and the gas tube was partially exposed. I had to really work to get the barrel nut aligned properly (standard Armalite nut) and was probably at or above the upper torque limit to get the last little turn. I did perform a dye penetrant test to check for cracks in the upper and there were none.
Now my problem is that using the Larue nut it appears that I am still about 2 degrees or less from being perfectly aligned at the maximum torque (80 ft/lbs). I don't want to stress the receiver any more. When I install the handguard there is a noticible misalignment between the receiver rail and the handguard rail (that anoying 2 degrees).
Yes, I have greased and torqued and loosened and greased and torqued and loosened and .... several times. I'm not gaining anything. I found a previous post discussing using a receiver lapping tool to remove some material from the front of the barrel socket to allow the barrel to seat a little deeper. I think I would only have to remove 1 - 2 thousands to get the extra rotation on the nut.
Does anyone have any other suggestions???
UPDATE STARTS HERE
Went ahead and got the barrel nut shims from Spike's Tactical. Removed and reinstalled barrel nut at 30 ft/lb to see where I was starting. Installed .002 in shims and wound up perfectly aligned at 70 ft/lb torque. Installed the gas block and came to a screeching halt.
The LaRue Tactical LT15-11FL would not fit over my Seekins Precision Low Profile Adjustable Gas Block. Hows that work? A single piece free float quad rail won't slide over a low profile gas block. Well, It is adjustable so maybe its not really all that low but the gas tube did line up without any problem. Anyway, what I wound up doing was etching (a scratch really) alignment marks on both the gas block and barrel. Pulled the gas block back off with the gas tube in place. I slid the quad rail over the barrel and then slid the gas block into the front of the quad rail. Slide the quad rail forward, install the gas tube into the upper receiver, tap the gas block into place with a wooden dowel making sure the marks were aligned. Tiighten the set screws on the gas block through the holes in the quad rail. (lucky they were there or I'd have had to drill one.) Finally, I am able to pull the quad rail back and tighten the locking collar.
Installed the flash hider and I'll be good to go as soon as I get it pinned and welded.