Lancer Systems L15 Magwell Extension . These AR 15 Parts from the fine folks at Lancer Systems fits most standard forged lower receivers for the ultimate in customization and modification. Thanks to the included rubber gaskets the Lancer L15 AR-15 Magwells provide a snugger tighter rattle-free fit compared to standard models. Increase your overall effective diameter without breaking the bank with this all-in-one tool. Decrease your overall reloading time with Lancer L15 M4 Magwells. Specifications for Lancer L15 Magwells: Manufacturer: Lancer Systems Condition: New Features of Lancer L15 Adaptive Magwells 7UD-MZW-LA999000210031 Available in one-piece and two-piece configurations (see chart below for compatibility details) Designed for milspec AR-15 rifles and standard forged lower receivers with removable trigger guards Machined from 6061 T6 aluminum Includes rubber gaskets for a snug rattle-free fit Compatible with most standard M4/M16/AR15 pattern magazines Package Contents: Lancer L15 Magwells 7UD-MZW-LA999000210031 Lancer L15 Competition Magwell - 999-000-2100-31