The Daniel Defense M4A1 FSP features the M4A1 FSP RIS II, which has been in use by US Special Operations Command (SOCOM) for the SOPMOD Block II program since 2005. The M4A1 FSP features a 14.5” Cold Hammer Forged M4 Profile barrel with a …

Hand Guard: Daniel Defense M4A1 RIS II FDE FSP/Non-FSP Bolt Carrier Group: Colt, FN Charging Handle: Standard GI, PRI Gas Buster Military Latch Rear Sight: Matech, Knights Armament Front Sight: FSP, Knights Full Size Front Sight (Taupe or Black)

The BCM 14.5” with a government profile does wonders under the handguard. On the other hand, the Daniel Defense M4A1 FSP handguard may not be the lightest, but it is ready to take some hits and will hold zero if we choose to add a laser.

Feb 9, 2019 · A pinned & welded FH prevents disassembly of the FSP version, while the non FSP will still slide over a low profile gas block. It’s not really an issue with a SBR lower, but it’s something to consider.

Apr 19, 2023 · Currently have the FSP version, I recommend the non-FSP first. The FSP rail seems a bit easier to obtain to the best of my knowledge. (I have both, in both mk18 and m4a1 versions of each) The non-FSP is what I recommend. Here’s why: no gunsmithing needed to remove the rail. Unscrew six bolts, it slides right off.

The M4A1 SOPMOD Block 2 with FSP represents a significant milestone in the evolution of the M4 platform. Its development through the SOPMOD program has resulted in a highly modular and effective weapon system that has seen extensive use by U.S. special operations forces.

Jul 7, 2011 · To those wondering what makes an M4A1 a Block II model, here are some of the characteristics and equipment that the Block II M4A1s have: Barrel: 14.5" M4 or SOCOM contour barrel

Nov 18, 2019 · Going Block II would give me a few things like a free floated hand guard, the ability to run a Surefire can, and EO-Tech becomes an option, ect. Not only that, there is a FSP (front sight post) version of the Block II SOPMODS.

The Block II M4 is probably the best do it all clone to do, it can be used in CQB, general purpose, mini RECCE, etc. As you are building it I would suggest making sure the base rifle is near perfect, it’ll take some time but worth it in the end to do it right.

Inspired by the USSOCOM SOPMOD Block II, the Daniel Defense M4A1 FSP Upper Receiver Group is designed for enthusiasts who demand military-grade precision and performance. This upper features the M4A1 FSP RIS II Picatinny quad rail in a striking Flat Dark Earth finish, paired with a 14.5" M4 profile barrel and a Mil-Spec F-marked front sight base.