Lantac RPS Ratchet Plate System
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 feature 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 it requires permanently deforming the metal, making it difficult to remove if you ever need to. With the RPS installed, it secures your end plate and castle nut together, retaining them in place until you need to remove them. Taking it off is 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.
Features
- 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 high-quality accessories for AR-15/M16 pattern rifles—precision-made in the U.S.A., including rifles, muzzle brakes, and more.




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