LANTAC's Side Charging Enhanced Bolt Carrier Group features a screw in charging handle system and is ideal for anyone who wants easier and faster access to the charging handle. Manufactured to the same stringent standards as their NiBE-BCG and features the same enlarged and forward porting vents, flared tail and forward assist serrations, for added flexibility when not being run in a side charging upper. It is the ideal BCG for USC (Upper Side Charging) receiver. It still functions as a Direct Impingement carrier and the Side Charging Handle reciprocates with the BCG. The E-BCG Side Charging Enhanced Bolt Carrier Group comes complete with three handle variants: knurled steel, smooth steel with silicone rubber insert, and neoprene over steel core. Handle base threads are 1/4-28 TPI and can be tightened in place using an adjustable spanner on the flats provided. Handles are retained by a special 3/16th allen head screw.