Primary Arms SLx 3-18x Throw Lever

(2 customer reviews)


Primary Arms SLx 3-18x Throw Leve

Upgrade your Primary Arms optic with our Primary Arms SLx 3-18x Throw Lever, speeding up magnification changes and target engagements without breaking the bank. Throw levers are especially useful in a number of different scenarios including but not limited to precision shooting competitions and cold weather hunting.  Our standard polymer Throw Levers are printed using one of our industrial oriented 3D printers. . Our levers are proudly printed in the USA from a custom made durable Nylon 6 material, and feature a metal thread insert for increased strength when tightening. Easily installs in a minute or less. Nylon 6 does not have the tensile strength of aluminum, but is extremely durable and will flex and yield under hard impact rather than damaging or marking your optic. This feature can be useful in a number of situations including shooting competitions and hunting when a throw lever may snag. Our levers feature a lifetime warranty.


Fits Primary Arms SLx 3-18x Optics


Available in the following materials:

Black Nylon

FDE Glass Fiber Nylon

Carbon Fiber Nylon



Find the rest of our Primary Arms Throw Levers Here


More Information About FDM Printing.

Fused deposition modeling (FDM), or called filament freeform fabrication, is a 3D printing process that uses a continuous filament of a thermoplastic material. Filament is fed from a large spool through a moving, heated printer extruder head, and is deposited on the growing work. The print head is moved under computer control to define the printed shape. Usually the head moves in two dimensions to deposit one horizontal plane, or layer, at a time; the work or the print head is then moved vertically by a small amount to begin a new layer.


Interested in Additive Manufacturing check out Additive Manufacturing Missouri


Weight 1 oz
Dimensions 2 × 2 × 1 in
Throw Lever Material

Black Nylon, FDE Glass Fiber Nylon, Carbon Fiber Nylon

2 reviews for Primary Arms SLx 3-18x Throw Lever

  1. Jerry Potts (verified owner)

    The new material holds up really well!! I hit the tailgate as I was putting my rifle in the bed of my truck, I was sure the lever would crack…but it is perfect.

  2. Ben (verified owner)

    Great product. Received and installed today. I removed the screw and was able to seat it over the top of the OEM throw-stub (very small). It fits great, tightened easily, I used it back and forth for a few minutes – seems to work great. I’ll try it at the range this week, but I’m confident it’ll work great for years to come.

    Customer service was also responsive when i reached out asking about shipping, and item was here a few days later. Very happy with product and I think the only company I found online that actually makes a throw lever for the 3-18 scope.

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