Magpul UCS (Universal Carbine Stock) Side Folding Stock - 1913 Picatinny

Magpul UCS (Universal Carbine Stock) Side Folding Stock - 1913 Picatinny

When adaptability meets rugged reliability, the result is the Magpul UCS—Universal Carbine Stock. Engineered for firearms with a rear-mounted M1913 Picatinny rail, the UCS delivers unmatched modularity, ergonomic comfort, and mission-ready performance. Whether you're running a SIG MPX, FN SCAR, CZ Scorpion, or PSA AK variant, this stock transforms your platform into a precision-configured powerhouse.

With six-position length-of-pull adjustment, reversible folding, and tool-free cheek risers, the UCS adapts to your gear, your optics, and your shooting style. Whether you're clearing rooms or dialing in long-range shots, the UCS ensures optimal head placement, sling compatibility, and rapid deployment—all in a sleek, American-made package.

Extreme Adjustability
Six-position push-button LOP adjustment offers 3 inches of total change, ideal for shooters with or without armor.

Reversible Folding Mechanism
Fold left or right to accommodate charging handle and ejection port placement.

Toolless Cheek Risers
Includes 0.50" and 0.75" risers for customizable comb height and improved sight alignment.

M1913 Rail Compatibility
Designed for firearms with rear Picatinny rails, including SIG MPX/MCX, FN SCAR, IWI Galil, CZ Scorpion, and more.

Height-Adjustable Clamp
Reversible M1913 clamp allows for ½-slot vertical adjustment for refined fit.

Comfort-Focused Design
Features the MOE SL® Enhanced Rubber Butt-Pad (0.70") for improved shoulder contact and rapid stock mounting.

QD Sling Ready
Reversible, anti-rotation QD socket enables secure sling attachment from either side.

Made in the USA
Built with Magpul’s signature quality and durability for professional-grade performance.

Specifications

• Material – High-strength polymer with rubber butt-pad
• Compatibility – Firearms with rear-mounted M1913 Picatinny rail (factory or adapter)
• LOP Adjustment Range – 3 in. across six positions
• Length – 7.6 in. (collapsed) to 10.6 in. (extended)
• Height at Butt Plate – 5.3 in.
• Width (Max at Hinge) – 1.9 in.
• Weight – 18 oz.
• Included Cheek Risers – 0.50" and 0.75", reversible and removable
• Included Butt-Pad – MOE SL Enhanced Rubber Butt-Pad, 0.70"
• Drop Angle – 5° for improved clearance
• Mounting Interface – Reversible M1913 clamp with ½-slot height variation
• Sling Mount – Reversible anti-rotation QD socket
• Not Compatible With – TYPE 1/2 Sling Mount Kits, CTR®, AK, Hunter/SGA® Cheek Risers, CTR, PRS, or Hunter Butt-Pads
• Platform-Specific LOP Ranges:
  • Sig MCX: 11.6 – 14.6 in.
  • Sig MPX: 11.9 – 14.9 in.
  • FN SCAR: 12.1 – 15.1 in.
  • IWI Galil: 11.6 – 14.6 in.
  • CZ Scorpion: 11.9 – 14.9 in.
  • Ruger LC Carbine: 13.6 – 16.6 in.
  • PSA AK: 12.0 – 15.0 in.