Lantac RPS Ratchet Plate System

Manufactured by Lantac USA
Manufactured by Lantac USA
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NOTE: Limit 3 per household. Quantities exceeding 3 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 1 business days or less. FFL orders take approximately 20 business days or less if you can provide us an actively receiving FFL location.



The Lantac RPS Ratchet Plate System is a quality of life upgrade that makes a huge difference when assembling your AR-15. This end plate and castle nut features a ratcheting system that negates the need for staking. The purpose of staking is to prevent your castle nut from backing off over time but requires you to permanently deform the metal, making it difficult to remove if you ever need to. With the RPS installed, it locks your end plate and castle nut together retaining it in place until you need to take it off. Taking it off I just as easy as installing it. All you need is your castle nut wrench to loosen it. The end plate features a QD sling attachment socket. Both the castle nut and end plate are CNC machined from 4140 steel and Nitride finished.

  • Mil-Spec QD Sling Point
  • CNC Machined single pass threads
  • Simple one piece ratchet locking plate
  • Protected engagement surfaces that cannot be accidentally damaged when installed
  • Aggressive Castle Nut grip pattern
  • Precision machined from 4140 Steel
  • QPQ Nitride finished

Lantac USA manufactures the highest quality accessories for AR-15/M16 pattern rifles. Precision made in the U.S.A., rifles, muzzle brakes and more.
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BrandLantac USA
FitmentAR-15 / AR-308

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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