14.5" FSP Block II | T.REX ARMS
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14.5" FSP Block II

BCM 14.5 suppressed build overview

Not every build has an end goal in mind but if you want a 500-yard gun that is capable of sending multiple mags of ammo downrange while maintaining accurate hits, this is a great way to go. Starting at the front, we have a SureFire RC2 suppressor. Because these are known for durability and minimal point of impact shift, it's a no-brainer for this build. The three-prong flash hider under the can will still help with some flash mitigation if we do choose to shave weight by removing the can.

BCM barrel and Daniel Defense handguard

At first glance, the gun looks very heavy. While it is a few pounds more than we'd prefer to hike around with, the barrel itself saves us a lot of weight. 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. The Knights Armament rail covers and vertical grip help to bring back the 2000's era aesthetic but, more importantly, they protect the shooter from growing heat that comes off the barrel.

Trijicon ACOG TA02 4x32

On this loadout, we opted for the Trijicon ACOG TA02 4x32. Now, because of the era that this build mimics, an ACOG may go unnoticed or one could assume that we installed it without a second thought. This could not be further from the truth. First, there are no moving parts inside of the ACOG — no external throw levers and no exposed turrets. This means two things. One, the design of the optic provides a very durable sighting system. Two, the fact that there are so few parts inside this optic, weight is saved. By comparison, a Vortex Razor 1-6 comes out at 21.5 oz with no mount but an ACOG on the other hand is just under 15 oz. Lastly, the glass clarity on these optics is outstanding. The ACOG is mounted on an ARMS Picatinny mount.

Trijicon RMR mounted on top

Next, we have an RMR (RM06) from Trijicon mounted up top. While this does cause some additional height over bore, it is easy to learn with a few quick reps. The other nice feature that we get when mounting a dot this tall is passive aiming under night vision. It can be difficult to get a tube behind an offset dot, but this is not the case with an optic this tall. With lots of dryfire and some range time, this setup is quite intuitive and easy to acclimate to.

SureFire M600 Scout Light on Thorntail mount

The SureFire M600 Scout Light is mounted to our handguard with an IWC/Haley Thorntail Offset Mount. By bringing the light higher up on the gun, it will cause any suppressor shadow to be under our illumination, instead of on the side.

Radian Raptor charging handle

We also opted to include a Radian Raptor Charging Handle in this build. Ambi charging handles are not always necessary but when prone, clearing malfunctions or shooting off-hand, they sure are nice to have. Out of all the aftermarket charging handles we run, the Raptors are our favorite, having never broken or bent on us. It's safe to say that they are a "go-to".

Fixed front sight post through optic

One may wonder what it feels like to look through a magnified optic with a front sight in the way. The truth is, anything past 2-3x (optic depending) will still give you a clear sight picture. If you look for the front sight through the optic while hard focusing on a target in the distance, you may find a slight haze at 6 o'clock, but in reality, it's not an issue. Having the fixed front sight is ultimately a nice touch to have, as it serves as a consistent sighting system if needed and a pinned gas block.

T.REX ARMS sling and rattlecan paint job

The build really comes together with a T.REX ARMS Sling, stowed on the left side of the rifle with a shock cord when not in use. Then there is the signature T.REX ARMS rattlecan paint job which solidifies this loadout as one of our go-to builds.

BCM 14.5 suppressed complete build

Build List

Component Product
Lower
Lower ReceiverAero Precision Lower Receiver with Mil-Spec Lower Parts Kit
StockB5 Enhanced SOPMOD
GripMagpul MOE
Trigger / Trigger GuardMil-Spec (Aero)
Rear Sling MountBCM QD End Plate
Upper
Upper ReceiverBCM (Bravo Company Manufacturing) Upper
BarrelBCM 14.5" Government Profile
Gas BlockFSP
Muzzle DeviceSureFire Three Prong Flash Hider
Handguard / Rail Daniel Defense M4A1 FSP
Knights Armament Rail Covers
BCGALG Defense / Nitride Bolt
Charging HandleRadian Raptor SD
Rear SightNone
Optic Trijicon ACOG TA02 4x32; ARMS Picatinny Mount
Trijicon RMR Type 2 (3.25 MOA RM06)
Light SureFire M600 Scout Light
IWC/Haley Thorntail Offset Mount
SuppressorSureFire SOCOM556 RC2
Front Sling MountIWC 45 Offset QD Picatinny Mount
ForegripKnights Armament Vertical Grip
AccessoriesT.REX ARMS Sling

If you have any questions about this build or others you see on our website, please feel free to contact our customer service team at [email protected].