The PWS Ratchet Castle Nut and QD End Plate Set secures the receiver extension (buffer tube) on an AR-15. The ratcheting castle nut locks in place without staking, so the buffer tube stays tight but can still be removed later. The end plate adds a QD sling attachment point at the rear of the receiver, a common choice for carbine and SBR-style setups.
- Brand: Primary Weapons Systems (PWS)
- Manufacturer part #: RLCN-KIT
- Fits: AR-15
- Includes: ratchet castle nut and QD end plate
- Feature: locks without staking
