SL-9 Combo Kit


Out of stock

This kit contains the SL-9 Reinforcement Kit plus all the AR-9 / AR-15 lower parts required to complete the SL-9 v2.8 Lower with Last Round Bolt Hold Open functionality.

You will need to print the lower itself, and provide the upper and other accessories.

Lower Parts:

  • Carbine Buffer Tube, Spring, and Extended Eight Ounce Mass.
  • Buffer Retainer Detent and Spring.
  • Safety Selector with Detent and Spring.
  • Trigger with Spring.
  • Hammer with Spring.
  • Disconnector with Spring.
  • Bolt Hold Open Lever with Dowel Pin, Spring, and Plunger.
  • Magazine Catch Spring.
  • Front and Rear Take Down Pins with Springs and Detents.

Reinforcement Parts:

  • Four Bushings.
  • Bushing Installation Tool
  • Two Aluminum Front Plates.
  • Cheek Plates.
  • Two 10-32 Nuts.
  • Two 10-32 x 1.25″ Screws
  • 3/32″ x 7/8″ Dowel Pin.
  • Magazine Catch.
  • Ejector.
  • Last Round Bolt Hold Open Levers.
  • Custom Black Oxide Steel Last Round Bolt Hold Open Shaft (replaces Aluminum Hex Rod shown in picture).
  • Hose Clamp.
  • Hose Clamp Cover.
  • Two 10-32 x 3/16″ Set Screws.

A small spare parts bag is added to each Combo Kit. This includes:

  • Take Down Pin Detent and Spring.
  • Safety Selector Detent and Spring.
  • Bolt Hold Open Pin And Plunger.
  • Buffer Retainer.

And that is everything in the kit! For more info, check out the SL-9 download on the Designs Page. This kit will not work with older versions of the SL-9.

Weight 22 oz


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