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B5 Systems Modular Picatinny Stock Flat Dark Earth MPS-1554 UPC 814927023611
Product Description
The B5 Systems Modular Picatinny Stock (MPS-1554) in Flat Dark Earth (FDE) is an advanced shoulder stock interface engineered for firearms featuring rear MIL-STD-1913 Picatinny receiver rails. Designed for modern subgun, PCC, and compact carbine platforms, this stock delivers an adjustable cheek weld, collapsible length-of-pull settings, and a heavy-duty side-folding mechanism without the mass or complexity of legacy buffer tube assemblies.
Precision-engineered with composite materials, steel hardware, and an integral left-side folding steel hinge, the Modular Picatinny Stock mounts securely to any standard rear 1913 rail interface. The stock provides 2-1/4 inches of collapsible length-of-pull adjustment alongside a spring-assisted cheekpiece that adds 1/2 inch of comb height for ideal optic axis alignment. Its FDE finish matches standard military and tactical earth-tone color schemes while providing a non-reflective protective layer against field wear.
Engineered for tactical versatility, the stock incorporates fixed sling mounts and integrated steel anti-rotation quick-detach (QD) sling swivel sockets for ambidextrous sling placement. The cushioned, non-slip rubber buttpad absorbs recoil impulse while maintaining positive shoulder traction across body armor and wet-weather gear. Lightweight and rugged, the B5 MPS-1554 offers a streamlined folding stock solution for custom bufferless rifle and pistol-caliber carbine builds.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct mounting compatibility with standard MIL-STD-1913 Picatinny rear stock adapters, receiver endplates, and bufferless platforms (e.g., SIG MCX/MPX, Ruger LC Carbine, CZ Scorpion with 1913 endplate, BRN-180, and AK platforms with rear Picatinny rail adapters).
- Inspect the host firearm's rear 1913 Picatinny rail for dirt, burrs, or solvent residue, cleaning the rail teeth thoroughly.
- Loosen the cross-bolt clamp on the B5 stock hinge assembly using the appropriate hex/Torx tool until the mounting jaws open sufficiently to clear the receiver rail.
- Align the stock's internal recoil lug with a cross-slot on the host rail at the desired height setting, pressing the clamp flush against the rail face.
- Torque the mounting clamp cross-bolt to manufacturer specification (typically 30–35 in-lbs) and apply threadlocker (Blue 242/243) to prevent loosening under heavy recoil and folding cycles.
Key Features
- Integral Left-Side Steel Folding Hinge: Locks firmly in both open and folded positions for compact storage and vehicle staging.
- Collapsible LOP Adjustment: Provides 2-1/4 inches of length-of-pull travel for customizable ergonomics across various gear setups.
- Adjustable Spring-Assist Cheekpiece: Adds 1/2 inch of cheek rest height for precise optical sight line alignment.
- Ambidextrous QD & Fixed Sling Mounts: Features steel anti-rotation QD sockets and fixed sling pass-throughs.
- Cushioned Non-Slip Buttpad: Textured rubber buttpad dampens felt recoil impulse and maintains solid shoulder contact.
- Flat Dark Earth Finish: Color-matched composite housing and hardware blend seamlessly with FDE camouflage patterns.
Product Specifications
- Brand: B5 Systems
- Model/Series: Modular Picatinny Stock (MPS)
- MPN / SKU: MPS-1554
- UPC: 814927023611
- Platform Fitment: MIL-STD-1913 Picatinny Rear Stock Adapter / Rail
- Material: Impact-Resistant Composite / Steel Hardware
- Length: 8.06 in
- Weight: 16.8 oz
- Finish/Color: Flat Dark Earth (FDE)
- Country of Origin: United States
