free float options with FSP

General Firearms NFA
1

Hey guys. My SBR has a Palmetto 10.5" upper with the FSP still intact. I currently have a Knights RAS. I am looking for options to get more rail forward of the FSP for a light and would also like to free float the barrel. I would also like the keep the FSP. Are my only options the Centurion C4? Would an MI rail occlude the muzzle devise?

2

Daniel Defense has the Lite 9.5 fsp.

3

The Daniel Defense MK18 RIS-II had a FSB model. I’m not sure if they still make it, but that would be my first choice.

4

I think their RIS II fsp is 12" only. I could be mistaken but I don’t see one on the site.

5

The Mk18 RIS FSP was discontinued. You’ll have to search around for one.

6

That 10.5" is a carbine right? If so these will work and you don’t have to remove the barrel nut.

http://www.sas-defense.com/product-p/rev-carfsb.htm

http://www.samson-mfg.com/mm5/merchant.mvc?Screen=PROD&Store_Code=SM&Product_Code=Evolution-7EX&Category_Code=AR-15_Carbine_Rails

7

Fortis REV has cutout option too…

8

Apex Handguards had or has an “extended carbine”

9

DD MK18 RIS II FSP

10

Centurion C4 is perfect.

Or you could cut down an NSR :smile:

11

For a quad rail, I haven’t found anything better than the RIS II because of the barrel nut attachment method (no need to align for the gas tube) and the low profile bottom.

Here it is on my 12.5".

12

For a quad rail, I haven’t found anything better than the RIS II because of the barrel nut attachment method (no need to align for the gas tube) and the low profile bottom.

Here is the MK18 RIS II FSP on my 12.5". If you can wait a month, I might decide to cut down my FSP to get a Centurion CMR 11".