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Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System Up to 30% Off — 4 models

Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
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Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
2 of 8 images
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
3 of 8 images
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG
4 of 8 images
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
5 of 8 images
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Red, Small, LE-BLK-K2-RED
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
6 of 8 images
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Blue, Small, LE-BLK-K2-BLU
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
7 of 8 images
Fortis Manufacturing K2 LE LW Enhanced AR15 End PLate System, Castle Nut, Locking Lever, Gray, Small, LE-BLK-K2-GRY
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG
8 of 8 images
Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG

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Questions & Answers
Customer Reviews
Helpful Positive Review
Nice concept, 4 stars because unsure of durability. by Judah, Verified Owner, December 8, 2022
This is a highly fascinating product, my only reservation is the steal feels hollow or soft. Like it could break or bend, no issues yet, but havent stressed tested. Don't get me wrong, it does what it says and may remarkable, but this is my upfront...
Read More...
2/6 found this helpful
Helpful Positive Review
New way if doing things! by Mik, Verified Owner, April 11, 2024
K1 is tapered castle nut version and K2 is lever lock version. Both are fantastic and negate the necessity for staking castle nuts and allow for easier removal when necessary. Make sure you torque correctly and they will serve you indefinitely. Addi...
Read More...
1/1 found this helpful
Helpful Positive Review
Better then expected by Matthew Hartpence, Verified Owner, August 8, 2022
This item works great if you are looking to make your buffer tube install much easier. It looks great and the Quick detach hole is a plus. Definitely an upgrade to the normal milspec. This item works like it should and I would buy again
1/2 found this helpful
Most Recent Reviews
No staking! by LP, Verified Owner, April 18, 2026
This castle nut is a great product! No staking needed.
Most Recent Reviews
I use it on every build by Happy customer, March 1, 2026
These are fantastic and worth the money. I use them on every build. It keeps the buffer tube tight and they are easy to take off if needed.
Most Recent Reviews
fits well, and looks great by James Owenby, Verified Owner, February 1, 2026
Love it, went on well and looks great. Wish you could post pics on here. Definitely recommend.
Read All 19 Reviews

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Product Info for Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System

When designing new Lightweight Enhanced (LE) Castle Nut and End Plate System, we came up with two systems that virtually eliminates the risk of ycastle nut ever backing out. With two lockdown systems (K1 and K2), we've engineered a solution to install the castle nut onto the end plate that is not only robust, but also stands true to brand of innovation and ingenuity. The K2 system utilizes a locking lever design that seats itself through a designed slot on the bottom of the end plate and into corresponding cutouts on the castle nut. This ultra precision fit allows the castle nut to seat itself into place without the need of staking the end plate. No set screws, no backing out and no failures. All of these features at only .53 oz / 15 grams!image

Specifications for Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System:

Manufacturer: Fortis Manufacturing
Finish: Milspec Anodized
Fabric/Material: 7075-T6 Aircraft Grade Aluminum
Hand: Ambidextrous
Gun Make: AR Platform
Gun Model: AR-15
Weight: 0.53 oz
Quantity: 1
Condition: New

Features of Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System

  • Lightweight design at only .53 oz / 15 grams total
  • Quick Detach Socket - 360 degree rotational locking interface
  • No set screws or ratcheting system

Package Contents:

  • Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System

What firearm models does the manufacturer say Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System is compatible with?

The manufacturer suggests that Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System is compatible with AR-15

Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System Orderable Models

List of Orderable Models

  • Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Red Castle Nut, LE-BLK-K2-RED , MPN: LE-BLK-K2-RED , UPC: 810103343153 , Code: 2GN-CAN-FOR202-LE-BLK-K2-RED
  • Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Blue Castle Nut, LE-BLK-K2-BLU , MPN: LE-BLK-K2-BLU , UPC: 810103343122 , Code: 2GN-CAN-FOR202-LE-BLK-K2-BLU
  • Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG , MPN: LE-BLK-K2-ODG , UPC: 810103343528 , Code: 2GN-CAN-FOR202-LE-BLK-K2-ODG
  • Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Grey Castle Nut, LE-BLK-K2-GRY , MPN: LE-BLK-K2-GRY , UPC: 810103343276 , Code: 2GN-CAN-FOR202-LE-BLK-K2-GRY

Fortis Manufacturing AR-15 LE Locking Lever Castle Nut/End Plate K2 System Unavailable & Discontinued Models

List of Unorderable Models

  • Open Box, Dealer Demo, Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Blue Castle Nut, LE-BLK-K2-BLU , MPN: LE-BLK-K2-BLU-DMO , Code: 2GN-CAN-FOR202-LE-BLK-K2-BLU-DMO
  • Open Box, Dealer Demo, Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Red Castle Nut, LE-BLK-K2-RED , MPN: LE-BLK-K2-RED-DMO , Code: 2GN-CAN-FOR202-LE-BLK-K2-RED-DMO
  • USED, Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Grey Castle Nut, LE-BLK-K2-GRY , MPN: LE-BLK-K2-GRY-EDEMO , Code: 2GN-CAN-FOR202-LE-BLK-K2-GRY-EDEMO-SC-C
  • USED Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, ODG Castle Nut, LE-BLK-K2-ODG, EDEMO1, Used, Condition Fair , MPN: LE-BLK-K2-ODG-EDEMO1 , Code: 2GN-CAN-FOR202-LE-BLK-K2-ODG-EDEMO1
  • Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, FDE Castle Nut, LE-BLK-K2-FDE , MPN: LE-BLK-K2-FDE , UPC: 810103343139 , Code: 2GN-CAN-FOR202-LE-BLK-K2-FDE
  • USED Fortis Manufacturing LE Lightweight Enhanced AR15 End Plate System, K2, Locking Lever, Grey Castle Nut, LE-BLK-K2-GRY, EDEMO1, Used, Condition Like New , MPN: LE-BLK-K2-GRY-EDEMO1 , Code: 2GN-CAN-FOR202-LE-BLK-K2-GRY-EDEMO1
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Last updated 2026-06-25 UTC.