Available in .380 Caliber 2.75" barrel and 3.25" barrel. 9mm in 3.0", 3.5", and 4.0" barrel. .40 S&W in 3.5" and 4.0" barrel. .38 Special/.357 Mag in 2.0" barrel. 45 in 3.5" and 4.0" Barrel The Versacarry System is made of three components: The Clip:The clip portion is made of a custom plastic resin designed for durability, strength, and heat resistance. An specifically angled bottom flange is molded into the clip to create a clamping action when the barrel retention rod is inserted into a gun barrel. The Barrel Retention Rod:The barrel retention rod is made of Delrin, a very strong plastic that has a natural lubrication property. The barrel retention rod is cut to exactly fifteen thousandths of an inch below the barrelâ€™s inner diameter. Due to the exacting manufacturing tolerances, the barrel retention rods will never harm a gunâ€™s barrel in anyway and ensure they will never become a barrel obstruction. During assembly the barrel retention rod is attached using a 1.25" coated steel fastener that securely fastens the clip portion to the barrel retention rod. This fastener travels the entire length of the rod to guarantee strength and integrity within the part. (All retention is gained by the angle of the clip in conjunction with the users pants and carry belt, and not from the diameter of the barrel retention rod itself.) The rod is just less than one and a half inches in length. The barrel retention rod is the same length on all models, but the outside diameter changes to accommodate the modelâ€™s caliber. The Coated Steel Fastener: The final component is a coated steel fastener securely fastens the clip portion to the barrel retention rod. This fastener self taps through the entire length of the barrel retention rod to guarantee strength and integrity within the part. In the comments section of the order form please indicate the caliber and barrel length you would like.