Browse Products
- Rifles
- Complete Upper Receiver Groups
- Cold Hammer Forged Barrels
- Rail Systems
- AR15/M4 Parts and Components
- Sling, Optic, and Flashlight Mounts
- Sights and Vertical Grips
- Apparel
- Black Fund Gift Card
- Tools
- Knife
My Account
You are here: Home | Browse | M4 Rails | Detail
M4 Rail 12.0 FSP (Carbine)
Description
The Daniel Defense 12.0 FSP Free Float Rail System features an opening in the top rail to accommodate the front sight post and gas block of a carbine length AR15 gas system. This precision cut-out provides much needed rail space along the top, sides, and bottom rails of the 12.0 FSP. The rifle’s front sight post protrudes through this opening but does not diminish the useable mounting area on the rail that extends beyond the gas block and over the carbine’s barrel.
This extra “real-estate” is a perfect location for aiming devices, flashlights, and laser sights.
The 12.0 FSP handguard is designed to work with the AR15 carbine gas system. The indexing pins are constructed from stainless steel while all other components are 6061-T6 aluminum. Every Daniel Defense Rail System is a Military Specification rail and are 100% Quality Assurance Tested for conformity.
Every rail comes with either ladders or panels are made from santoprene, which can handle heat up to 350.
Recently Viewed Items
To help you quickly find items that you recently viewed, we have compiled the following list of previously viewed items. Use the delete buttons provided to remove individual items or the clear all button to empty the entire recently viewed list.
| Delete | Name | Price |
| M4 Rail 12.0 FSP (Carbine) | $346.00 |
Description
The Daniel Defense 12.0 FSP Free Float Rail System features an opening in the top rail to accommodate the front sight post and gas block of a carbine length AR15 gas system. This precision cut-out provides much needed rail space along the top, sides, and bottom rails of the 12.0 FSP. The rifle’s front sight post protrudes through this opening but does not diminish the useable mounting area on the rail that extends beyond the gas block and over the carbine’s barrel.
This extra “real-estate” is a perfect location for aiming devices, flashlights, and laser sights.
The 12.0 FSP handguard is designed to work with the AR15 carbine gas system. The indexing pins are constructed from stainless steel while all other components are 6061-T6 aluminum. Every Daniel Defense Rail System is a Military Specification rail and are 100% Quality Assurance Tested for conformity.
Every rail comes with either ladders or panels are made from santoprene, which can handle heat up to 350.
Specifications
The Daniel Defense M4Rail Handguard System was designed around these parameters:
- Must be free float.
- Must be light weight and strong.
- Must be able to quickly dissipate heat.
- Must feel like a conventional forearm (Oval not round).
- Must lock to barrel nut or upper receiver to prevent spin.
Materials & Construction
Precision CNC machined from 6061 T6 aluminum and Military Specification Type III Hard Coat Anodized.
- 6061 T6 Aluminum
- Military Specification Type III Hard Coat Anodized
- Weighs only 12.5 ozs!
- Made in the USA!
Installation Instruction
Manufactured by: Daniel Defense, Inc.
Reviews
No reviews available for this product.
Would you like to leave a product review? If you are a returning customer, please login. Otherwise take a moment to register an account to access the extended features we have to offer.
Photo Viewer
Click on a thumbnail below to see its full size counterpart. You can use your keyboards arrow keys to navigate backward and forward through the images. Captions have been provided where necessary.
Related Items
Below is a list of items directly related to the product in question. Click any product below for further details.
![]() |
M4 Threaded Ring Spanner WrenchDescription This spanner wrench is utilized to tighten our free float rail systems threaded ring. Previously all free float rail systems on the continued... |
![]() |
M4 Rail 7.0 (Carbine)Description The Daniel Defense M4 Rail(tm) 7.0 Free Float Rail System is the lightest rail system available on the market, bar none! It weighs an continued... |
![]() |
M4 Rail 9.5 FSP (Carbine)Description The Daniel Defense 9.5 FSP Free Float Rail System features a cut in the front of the top rail to accommodate the front sight post and gas block continued... |





