SL-9 Reinforcement Kit


This kit contains the reinforcement parts needed to complete the 3D printed SL-9 v2.8 Lower with Last Round Bolt Hold Open functionality.

You will need to provide all of the AR-15 / AR-9 parts, and print the lower itself. If you want a more complete kit, check out the SL-9 Combo Kit.

Included in this kit:

  • 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.

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 4 oz
Dimensions 5 × 3 × 0.5 in


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