SLR-104UR QUAD-RAIL

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  • Weight
    7 lbs
  • SKU
    SLR104-54R

SLR-104UR - 5.45x39.5mm caliber, Stamped receiver, short gas system, front sight block / gas block combination, cleaning rod, black polymer furniture, stainless steel heat shield, left-side folding polymer stock, 2 stage trigger, and scope rail.

The PR-03 Picatinny Quad Rail Handguard System was designed and manufactured to meet and exceed the following stringent military requirements:

  • Ability to accept cleaning rod with the rail system installed achieved with stainless steel internal guide rail
  • To easily align the rail system with both milled and stamped receivers achieved with a pair of precision machined tabs
  • Ability to constrain debris from entering into the receiver from under-rail openings achieved with sealing caps of the rail system
  • Minimize weight, while providing maximum strength achieved with the triangular support design and utilizing aircraft grade durable aluminum material
  • Providing the maximum number of rails achieved with optimum design with 14 rails on the bottom and the sides, and 9 rails on the top
  • Identification marks for repeat attachment of devices achieved with clearly marked numbering system on all 4 sides
  • Provide comfortable grip to the shooter achieved with compact system profile and smooth finish

Picatinny Quad-Rail System for attaching Lasers, Flashlights, and Optics.


CURRENTLY OUT-OF-STOCK → Learn more here.

  • Manufacturer
    Arsenal
  • caliber:
    5.45 x 39.5 mm
  • total length:
    876 mm (34 1/2 in.)
  • folded length:
    415 mm (16 1/4 in.)
  • barrel length:
    635 mm (25 in.)
  • rifling:
    4 grooves
  • twist rate:
    1 in 200 mm (7.87 in.)
  • weight w/o magazine:
    2.79 kg (6.1 lbs.)
  • muzzle velocity:
    900 m/s (2,953 fps)
  • effective range:
    625 m (684 yds)
  • maximum range:
    1,350 m (1,480 yds)
  • rate of Fire:
    40 rds/min (practical)

You can purchase our products from our distributors, at your local dealers, or online at www.k-var.com.

California Proposition 65

WARNING: None of the firearms manufactured or imported by Arsenal Inc. are manufactured or imported with the intent to be sold in CA.  Nevertheless, be advised that some products sold on this website and/or manufactured by Arsenal Inc. can expose you to chemicals, including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to  www.P65Warnings.ca.gov.