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TR1
05-15-12, 05:26
I'm looking for a mid-length *tubular* handguard that has an opening in the top rail to accommodate the front sight post and gas block of a carbine-length AR15 gas system.

Can anyone recommend a good solution? A Daniel Defense Modular Float Rail with the requisite cutout would be ideal.

The closest thing I've found is the JP Enterprises Modular Hand Guard with the Sight Pocket Extension, but the mounting system apparently leaves something to be desired (as discussed here): https://www.m4carbine.net/showthread.php?t=78778

Thanks

Casull
05-15-12, 05:42
Troy makes a tube cutout rail now that's drop-in for carbine gas length systems.

http://troyind.com/wp-content/uploads/Troy-BattleRail-Delta-3.jpg

http://troyind.com/%20/rail-systemsaccessories/rails/ar15m16-rails/drop-in-rails/troy-battlerail-delta

TR1
05-15-12, 06:07
Thanks for the quick reply, but I should have clarified that I'm specifically looking for a 'slick' tubular design, like the DDM4 V7/MFR.

http://i233.photobucket.com/albums/ee306/_TR1/th_untitled.png (http://i233.photobucket.com/albums/ee306/_TR1/untitled.png)

Big L.E.E.
05-15-12, 07:16
http://troyind.com/wp-content/uploads/Troy-BattleRail-Delta-1.jpg

The Troy is pretty slick.

Otherwise, APEX makes a tube with a cutout.

2150 Apex Handguard System, AR-15, Gator Grip, Ext. Carbine Length with Cutout (http://www.apexhandguard.com/store.php?seller=ApexMachiningCompany&navt1=19974&pd=347061)

Beat Trash
05-15-12, 08:49
The Troy Delta rail is exactly what I'm looking for personally. Unfortunately, Troy has not started to produce them yet. I've been calling since it was announced at SHOT. The only answer to when it might be available is "Soon".

JBarbaresi
05-15-12, 10:43
you may want to check out the centurion arms c4 line up. its a quad rail but extremely light weight and they offer FSP options in carbine and middy length.

Vgex2
05-15-12, 11:14
There is the Samson Evolution (http://www.samson-mfg.com/ar-15_html/product/Evolution-9EX.html):

http://www.samson-mfg.com/mm5/graphics/00000001/Samson_Evolution_Series_9ex.jpg

TOMTOM
05-15-12, 11:44
Another option is the JP rifles VTAC carbine handguard, with the sight-pocket extension piece.

http://www.jprifles.com/buy.php?item=JPHG-4M

plus this

http://www.jprifles.com/buy.php?item=JPHG-EXT

TR1
05-15-12, 12:43
Thanks for the replies, guys. I should have mentioned that the intention is to mount a white light at 12 o'clock in front of the FSP, so that means I require rail section ahead of the FSP and rules out any handguard that has that area cut away.

jonconsiglio
05-15-12, 13:08
There are no hand guards made with a rail section in front of the front sight for a mid length gas system, only carbine gas systems. You would need something along the lines of a 14.5" rail.

The Centurion mid length cutout rail is about 12" long and the side rails stop at the front side of the FSB.

So, for a mid length, you'll have to settle with a 9" rail or a cutout that surrounds the FSB but does not add rail in front of it.

polymorpheous
05-15-12, 13:40
There are no hand guards made with a rail section in front of the front sight for a mid length gas system, only carbine gas systems. You would need something along the lines of a 14.5" rail.

The Centurion mid length cutout rail is about 12" long and the side rails stop at the front side of the FSB.

So, for a mid length, you'll have to settle with a 9" rail or a cutout that surrounds the FSB but does not add rail in front of it.

What he said.
You may want to check out the Mossie light mount.

PRGGodfather
05-15-12, 15:40
The Mossie Midnight Mount works well with a middy gas system and FSB. The picture in the link below is a middy with FSB:

http://battlecomp.com/store/index.php?main_page=product_info&cPath=3&products_id=48

Casull
05-15-12, 15:47
Guys,


... an opening in the top rail to accommodate the front sight post and gas block of a carbine-length AR15 gas system.


TR1, as shown by TOMTOM there is the JP setup as it is. It's probably as slick as it gets. Then as mentioned the Samson Evolution Series 7”-EX is an option although doesn't go beyond the FSP much if at all. I think that's where the Mossie Midnight Mount could play a role depending on what you want out of your system specifically.

dirt_diver
05-15-12, 16:15
Troy makes a tube cutout rail now that's drop-in for carbine gas length systems.

http://troyind.com/wp-content/uploads/Troy-BattleRail-Delta-3.jpg

http://troyind.com/%20/rail-systemsaccessories/rails/ar15m16-rails/drop-in-rails/troy-battlerail-delta

This looks like a GREAT option.

justin_247
05-15-12, 16:29
You might be interested in the Apex handguard... it's as drop-in as the Centurion rails.

http://www.apexhandguard.com/store.php?seller=ApexMachiningCompany&navt1=19974&pd=347061

http://www.prestoimages.net/store30/rd3738/3738_pd211484_9.jpg

TR1
05-18-12, 13:37
Thanks for all their input. It's for a carbine-length gas system as I mentioned in the original post, not a mid-length gas system. Also, the Apex Machining and Centurion Arms products do not meet the criteria because they don't have a top rail section that extends past the FSP. The new [I]Centurion C4 FSP rail is nice, but not an option because it's not a slick tubular design.

Since there doesn't seem to be a product with all the specific features I'm looking for, I may contact a friend who is a machinist and we'll modify an existing system to meet the criteria.

I quickly threw this together in Photoshop to illustrate what I'm thinking of, although of course it's just a concept image:

http://i233.photobucket.com/albums/ee306/_TR1/custom_FSP.jpg

Thanks,
TR1

AKDoug
05-18-12, 13:50
If somebody produced that, it would sell like hotcakes. It would have to be a two piece design and I don't know how "slick" it would end up being once you design in places for the two halves to bolt together. Clearing the bayonet lug on the FSB might be problematic and the very reason Troy puts that drop down area with a rail on their tubes.

jonconsiglio
05-18-12, 14:08
Sorry man. You should change the topic from "mid length hand guard" to "carbine FSP cutout tubular hand guard". It confused a number of us and simple minds like mine can't always read past the thread title.

I've seen photos of a VTAC hand guard with a carbine cutout and full top rail. I don't know if it's a production item or someone had it cut.

I have no clue, but it could be possible to have an MFR cut to fit. I guess it's worth looking into if this is what you really want.

Warg
05-18-12, 15:01
If somebody produced that, it would sell like hotcakes. It would have to be a two piece design and I don't know how "slick" it would end up being once you design in places for the two halves to bolt together. Clearing the bayonet lug on the FSB might be problematic and the very reason Troy puts that drop down area with a rail on their tubes.

It wouldn't have to be a two piece design, but would be a more of a PITA to install if was one piece. Obvously, one would need to slide the one piece HG on with the FSB/gas tube simultaneously and the tube would need to have holes to access the FSB pins. Most likely the lug and the swivel ears would have to go if a slim tube is desired.

AKDoug
05-18-12, 16:04
Warg, great idea.

jonconsiglio
05-18-12, 16:27
The VTAC I was talking about is a one piece design as is the Lite rail.

AKDoug
05-18-12, 19:44
After a little research it appears that a JP Vtac carbine tube with the tube extension would do the trick for you. https://www.m4carbine.net/showthread.php?t=78778

Wouldn't take too much machining to cut a DD MFR for the sight and an access for the FSB pins. I have no clue how much strength you would lose, though.

Casull
05-19-12, 03:42
Machine the DD to do what you want? why not?

Well, basically that's going to take a lot of work to get on imho. It's doable, but will take some problem solving.

The Vtac/JP does seem like the best bet though.