
Fortis Manufacturing
Overview
The Fortis Light Weight K1 Castle Nut and End Plate is designed from 7075-T6 aluminum and features a hardcoat anodized finish for added durability. This enhanced type castle nut and end plate set provides a secure attachment point for the buffer tube, ensuring stability during operation and minimizing slippage. You'll often find this product in builds utilizing a mid-length gas system chambered in 5.56 NATO, making it a practical choice for those configurations.
Fortis Light Weight K1 Castle Nut and End Plate Black, Gray - LEBLKK1GRY
Prices checked
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, but today none of the 6 retailers we track has it in stock right now. Prices barely moved in October 2026, holding around $37.95, with no real sale all month. Listed prices start at $37.95 at BattleHawk Armory for when it comes back.
Prices checked · refreshed daily across 37 retailers
Builds in the community that include the Fortis Light Weight K1 Castle Nut and End Plate Black, Gray - LEBLKK1GRY
| Build | Parts | Total |
|---|---|---|
![]() | 18 | $1213.90 |
![]() | 21 | $2564.20 |
![]() | 24 | $3791.02 |
![]() | 35 | $3398.44 |
![]() | 29 | $4975.47 |
![]() | 18 | $2233.40 |
![]() | 16 | $1249.04 |
![]() | 20 | $1489.12 |
![]() | 27 | $2252.38 |
![]() | 22 | $1407.41 |
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