RRA (Rock River Arms) AR15 Lower Receiver Parts Kit AR-15 LPK Kit Description: Phosphate coated, mil-spec, and heat treated high quality lower parts kit. Aluminum trigger guard is hardcoat anodized to mil-spec. May be ordered with standard military trigger or National Match RRA 2 Stage Trigger. Other options include standard pistol grip or Hogue Rubber Ergonomic Grip. Trigger Upgrade Option: Rock River Arms RRA two-stage match trigger offers improvement over standard AR triggers and can instantly improve your accuracy. A drop-in, match grade trigger, it provides a crisp, 4 to 5 lb., 2-stage, trigger pull to improve accuracy for competition or varmint shooting. Sear engagement point is located behind the hammer to reduce pull weight. Low mass hammer speeds lock time. Includes trigger and hammer pins. Fits AR-15 receivers with .154" hammer and trigger pins. SPECS: Steel, matte black finish. Fits Standard (NOT COLT) AR-15 receivers with .154" hammer/trigger pins only (Like DPMS, RRA, Armalite, Olympic, etc.). Includes the following lower receiver parts: - Pistol Grip
- Trigger
- Hammer
- Disconnector
- Selector
- Bolt Catch Spring
- Detent Spring
- Bolt Catch Buffer
- Take Down Detent
- Bolt Catch
- Magazine Catch Spring
- Bolt Catch Roll Pin
- Magazine Catch Button
- Magazine Catch
- Front Pivot Pin
- Hammer Spring
- Trigger Spring
- Pistol Grip Screw
- Pistol Grip Lock Washer
- Selector Spring
- Detent Selector
- Hammer Pin
- Trigger Pin
- Take Down Pin
- Buffer Retainer Pin
- Buffer Retainer Spring
- Disconnector Spring
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