CMC Triggers AR 15 Quick Detach QD Receiver End Plate Steel Black CMC EP QD UPC 810169562482
Product Description
The CMC Triggers® AR-15 Quick Detach Receiver End Plate (SKU: CMC-EP-QD / UPC: 810169562482) is a combat-grade receiver extension upgrade engineered to establish a low-profile, single-point or two-point QD sling attachment right at the center of gravity of the carbine. By integrating a dedicated push-button QD socket directly beneath the castle nut, this end plate streamlines sling transitions and prevents weapon bind without adding bulk.
Manufactured from stamped and heat-treated ordnance-grade steel, the CMC-EP-QD provides superior shear resistance and structural rigidity compared to lightweight aluminum alternatives. The entire plate is finished in a military-standard manganese phosphate treatment, delivering high surface hardness, corrosion protection, and deep oil absorption that resists field wear, sweat, and inclement weather. The precision-machined QD socket cleanly accepts all standard push-button sling swivels for rapid detachment.
Functioning simultaneously as the indexing anchor for the receiver extension and the retention wall for the rear takedown pin detent and spring, this plate maintains true Mil-Spec dimensions. The rear profile is intentionally contoured to leave ample clearance for proper castle nut wrench engagement and clean, dual-point punch staking, guaranteeing your receiver extension stays permanently locked under harsh cyclic recoil and duty weapon deployments.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Fits standard AR-15, M4, M16, and AR-10 / LR-308 collapsible carbine buffer tube assemblies. CRITICAL: NOT compatible with A1/A2 fixed stock receiver extensions. Always verify that the rear takedown pin spring does not kink or bind into the lower receiver channel during assembly. Torque castle nut to 38-42 ft-lbs and stake the end plate into the castle nut notches in at least two places using an automatic center punch.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
- Slide the CMC QD End Plate onto the carbine buffer tube behind the castle nut, ensuring the forward alignment detent tab faces the lower receiver and the QD socket faces toward the stock.
- Insert the rear takedown pin detent and spring into the lower receiver channel, carefully guiding the end plate forward flat against the receiver without binding or bending the spring coils.
- Seat the lower alignment tab into the receiver indexing notch, hand-tighten the castle nut forward against the plate, and torque to 38-42 ft-lbs using an armorer's castle nut wrench.
- Stake the end plate material into the castle nut drive notches in two places using a spring-loaded center punch, then insert a push-button QD sling swivel to verify immediate lockup and smooth rotational clearance.
Key Features
- Integral Push-Button QD Socket: Establishes a centered, low-profile quick-detach sling mounting point for seamless left/right shoulder transitions.
- High-Strength Heat-Treated Steel: Resists sling tension torque, impact deformities, and fastener stripping far better than cast aluminum plates.
- Mil-Spec Manganese Phosphate Finish: Provides superior corrosion resistance, holds protective lubricants, and resists harsh operational weathering.
- Positive Armorer Staking Geometry: Engineered with clear access zones to facilitate secure, permanent staking into castle nut notches.
- Universal Carbine Tube Compatibility: Direct drop-in fitment across standard Mil-Spec and Commercial AR-15 / AR-10 carbine receiver extensions.
Product Specifications
- Brand: CMC Triggers®
- Model/Series: AR-15 Quick Detach Receiver End Plate
- MPN / SKU: CMC-EP-QD / CMCEPQD
- UPC: 810169562482
- Material: Stamped Heat-Treated Ordnance Steel
- Finish: MIL-DTL-16232 Manganese Phosphate (Black)
- Socket Interface: Standard 0.375" Push-Button Quick Detach (QD)
- Platform Compatibility: AR-15 / M4 / M16 & AR-10 Carbine Receivers
- Country of Origin: USA
