The LANTAC SF 15 Builder Set 12.5" RL is a premium AR-15 lower receiver kit designed for enthusiasts looking to create a customized rifle. This builder set includes an upper and lower receiver, along with a 12.5" M-LOK handguard that offers lightweight durability and versatility. The forged receiver set is engineered with above milspec features, enhancing reliability and performance during use. The lower receiver features a spot face cut for easy rear pin removal, while the internally flared magwell ensures smooth magazine changes in high-pressure situations. Whether you're at the range or in the field, this set is built to meet the demands of serious shooters.