Spartan Precision Equipment Disc-Lok Q-Sert Adapter Black. It threads directly through the handguard into the barrel interface for a clean secure fit. Built around our Disc-Lok Technology this semi-permanent attachment system is tailored for tactical and competition shooters who need a rugged dependable connection that still allows for quick transitions between bipods tripods and other support systems. Specifications for Spartan Precision Equipment Disc-Lok Q-Sert Adapter: Manufacturer: Spartan Precision Equipment Color: Black Weight: 1.7 oz Package Contents: Spartan Precision Equipment Disc-Lok Q-Sert Adapter Spartan Precision Equipment SP02-045-R: Disc-Lok Q-Sert Adapter Black