HIPERFIRE PDI Trigger Assembly AR-15/ AR-10 2lb Pull Drop-In Nitride Black. Specifications for HIPERFIRE PDI AR15/10 Drop-In Trigger Assembly: Manufacturer: HIPERFIRE Trigger Pull Weight: 2 lb Included Accessories: Finger Pad Condition: New Trigger Installation Type: Drop-In Features of HIPERFIRE PDI AR15/10 Drop-In Trigger Assembly MIL-Grade Hammer Strike No LPS Ever Exceptionally Smooth Feel Enhanced Corrosion Protection Polished Look PCC Blowback Tough Hammer Collision Bumper Disconnector Crash Protection Disconnector Spring Crush Protection Package Contents: HIPERFIRE PDI AR15/10 Drop-In Trigger Assembly HIPERSHOE Finger Pad What firearm models does the manufacturer say HIPERFIRE PDI AR15/10 Drop-In Trigger Assembly is compatible with? The manufacturer says that HIPERFIRE PDI AR15/10 Drop-In Trigger Assembly is compatible with AR-15 AR-10 SIG Sauer MCXHIPERFIRE PDIBLK: PDI Trigger Assembly AR-15/ AR-10 2lb Pull Drop-In Nitride Black