SL-9 Combo Kit

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.