Safariland SafariVault Level 3 RDS Duty Holster for Glock 17 w Light Hand:Left "name": "What is the difference FLC FX773009442REG "name": "What is the difference between weighted and non weighted versions it's an essential accessory that complements your concealed carry lifestyle Gun fit: Glock 17 w Streamlight TLR 1 Glock 19 w Streamlight TLR 1 Increased structural integrity for increased impact resistance Improved ALS design reduces holster body flex Self clearing optic cover accommodates wide range of pistol optics Magnetic guidance system aligns firearm while holstering Minimal learning curve for those with Safariland duty holster experience Pass through muzzle design for threaded barrels SafariVault's open muzzle design provides clearance for threaded barrels or compensators and allows debris or brass to pass through