BAD-LPK-PK3 3 Piece Enhanced Lower Parts KitEnhanced Bolt Catch (BAD-EBC-IC), which is a cost-friendly alternative, without sacrificing the quality for your AR build! The AR-15 Cast Enhanced Bolt Catch is 8620 heat treated cast steel with a manganese phosphate black finish.With this upgrade, you have a versatile modular design, enhanced control surfaces, lightweight engineering, and better ergonomics.Features: Lightweight but Robust Design 0.39oz Compatible with Norgon Ambi-Catch Without Interference Raised "T-Shaped" Heel Provides Positive and Distinctive Control Surface for Bolt Lock Back Bold Horizontal and Diagonal Serrations Provides Positive Purchase Enhanced Single Sided Safety Selector (BAD-E4S-IC) for the AR15 Style Rifles.Based on our famous BAD-ASS Ambidextrous Safety Selector with distinctive and diagonal serrations. Single Side Safety Selector (0deg-90deg SEMI AUTO) Fit all Mil-Spec Dimensioned AR-15 Lower Receiver Black Phosphate Finish Investment Cast 8620 Heat Treated Steel MADE IN U.S.A. Enhanced Magazine Catch - BAD-EMC-IC Process: Investment Cast (Same Process as Mil-Spec) Material: 8620 Heat Treated Steel Finish: Black Phosphate Finish Construction: One Piece Engineering (Not Two-Piece) Design: Lightweight Fluted Design Compatibility: Compatible with Mil-Spec Magazine Release Button, BAD-EMR, BAD-EMMR, etc. Length: Shorter Threaded Pin to Reduce Installed Magazine Button Profile of Solid Face Magazine Release Buttons Weight: 0.25 oz (v.s. 0.32 oz Mil-Spec)