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Old 12-01-2019, 11:32 PM
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Default Mounting light to AR with plastic handguards



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I've been meaning to do this for a while and am finally getting around to it.

I want to mount a light on a black rifle that has plastic handguards. Budget is as cheap as possible

I could replace the handguards with a quad rail, but $$$ and weight. Any quality, budget-friendly recommendations for a quad rail are welcome, but I'm also/more interested in the best way to mount it to the rifle with the stock handguards.

I haven't figured out the right pressure switch for this light (Streamlight Polytac) so for now it'll be thumb-operated. New territory for me so we'll see if it's even workable like that.

I've seen rails that attach via the vent holes in the handguards (even one that's a triple rail) and sort of lean that way. That's about $25 with shipping.

Other options? Voices of experience in mounting lights to ARs with plastic handguards?
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Old 12-01-2019, 11:45 PM
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`

https://www.cdnnsports.com/ar15-hand...k-polymer.html


.



.
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Old 12-01-2019, 11:49 PM
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Cheap, expedient, and did I mention cheap method: Most plastic hand guards have holes already in them, put a small carriage bolt through one and now you have a mounting bolt for whatever you want to attach.
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Old 12-02-2019, 03:14 AM
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You need to be more specific about “plastic handguards”.

Most of them have purpose made rails that attach, but they vary by brand, model, etc.

Let us know exactly what gun and/or furniture you have, as well as any front sight, and we can help better.
We also need to know about the rail (if any) over the receiver, or if it’s a carry handle.
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Old 12-02-2019, 04:54 AM
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I need to get a couple of those. I added magpul furniture to a couple of my AR to mount a light.
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Old 12-02-2019, 04:59 AM
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Quote:
Originally Posted by drobs View Post
I need to get a couple of those. I added magpul furniture to a couple of my AR to mount a light.
Dunno.

I'd give just 1 a try, if sticking with standard hand guards.

The ergonomics do not look that great to me. However might be worth a try, could be pleasantly surprised.
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Old 12-02-2019, 07:54 AM
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Kley-Zion makes a bayonet mount that slips on and works well. You lose the bayonet mount, so its a trade-off if youre into mounting a bayonet.

This is one with an TLR-1 on it.....



And one with a Streamlight Polytac. The Polytac uses an additional rail mount, and can be offset to either side.....





They also make one that goes on top of the barrel and mounts on the sight tower. It also gives another sling mounting option. I havent used one of them, but it looks like another option....

https://www.botach.com/kz-ar15-m4-si...-combo-mounts/

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Old 12-02-2019, 08:50 AM
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Quote:
Originally Posted by ajole View Post
You need to be more specific about “plastic handguards”.

Most of them have purpose made rails that attach, but they vary by brand, model, etc.

Let us know exactly what gun and/or furniture you have, as well as any front sight, and we can help better.
We also need to know about the rail (if any) over the receiver, or if it’s a carry handle.
Bushmaster XM15. Fixed A2 type carry handle.
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Old 12-02-2019, 04:19 PM
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Those Kley-Zion mounts look legit! I may have to grab a couple of those.
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Old 12-02-2019, 06:23 PM
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Hose clamps or duct tape. The OG solution to mounting lights to rifles.
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Old 12-02-2019, 08:07 PM
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Quote:
Originally Posted by Surviving Suburbia View Post
Bushmaster XM15. Fixed A2 type carry handle.
20” barrel, rifle length A2 style round hand guards with the large circular holes along the bottom? But the front hardware also has the triangle mounting flanges?

Something like this will work.

https://shop.windhamweaponry.com/product/hgd-mi-rail-4/

Or better yet spend $35 at your favorite parts dealer, and buy these handguards, and mount anything you want using MLOK fittings.

https://www.magpul.com/products/moe-...length-ar15-m4
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Old 12-03-2019, 08:52 AM
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It's 14.5 inch with a staked 1.5" flash suppressor, but that Windham thing looks like exactly what I'm wanting. Is the handguard vent hole spacing the same for carbine handguards as for rifle length?
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Old 12-03-2019, 10:45 AM
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I googled picatinny rail for stock ar15 hand guard and found this listing.

https://www.combathunting.com/Quad_R...Handguard.html

$10 and I have used something like this myself before to add a VFG to a beater AR. So far its holding well with no issues. Although I dont remember where I bought mine from.
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Old 12-03-2019, 11:10 AM
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Quote:
Budget is as cheap as possible
Gorrilla Tape.....its takikewl black...
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Old 12-03-2019, 11:16 AM
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Quote:
Originally Posted by Surviving Suburbia View Post
It's 14.5 inch with a staked 1.5" flash suppressor, but that Windham thing looks like exactly what I'm wanting. Is the handguard vent hole spacing the same for carbine handguards as for rifle length?
I don't know for sure. But I'll try to remember to measure mine tonight, and get back to you so you can compare.

BTW..here's my XM15...A1 style rear sights, I added the triangular guards, so it feels just like the one Uncle Sam let me play with.
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Old 12-03-2019, 02:17 PM
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When I owned an M&P 15 with plastic handguard, I used something called a BeamLOKR (I think) for a light, which attached via magnet to the barrel and sat flush up against the bayonet lug. I sold the M&P a couple years back, and it doesn't mount right without a bayonet lug, so now it just sits in a box. It worked well, though.
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Old 12-04-2019, 05:43 PM
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https://www.impactweaponscomponents....-mount-n-slot/
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Old 12-04-2019, 06:43 PM
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Many years ago my 600 series surefire came on One of these:
https://www.amazon.com/Universal-Sid...502956&sr=8-12

<$6
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Old 12-04-2019, 08:28 PM
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How about using zip ties or hose clamps? They give you more flexibility on where you attach you items

Sent from my SM-G955U using Tapatalk
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Old 12-08-2019, 02:24 PM
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Thanks to all for your input and ideas. I ended up going with something of a homemade hybrid that combines a few of the suggestions. I remembered that I have one of those rail adapters that attaches to the top of an AR carry handle. I don't like using it because mounting an optic above the carry handle just makes for an awkward aiming experience, and besides, I've learned to like the iron sights.

Anyway, I cut the rail adapter to be a size that would fit inside the forward sight tower. The photos will explain much more quickly than I could do with words. I'm thinking I still need to cut off some of the rail forward of the light, since it's extraneous, and could actually be used elsewhere. I also obviously need a new washer...that old rusty one was the only one in my stash that is the right size.

It's rough and ready, but it works. Alignment needs fine tuning, but overall the light is in the perfect place for using the thumbswitch without moving my forward hand. I'm super impressed with the Polytac, too. I'm no flashlight connoisseur, but it seems solid and is VERY bright.
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