The Snake Slayer IV has a 4.25" long barrel (versus 3.5" barrel). This longer barreled Snake Slayer provides tighter shot patterns, higher velocities, and even more manageable recoil than the original Snake Slayer The Snake Slayer IV will accept all the extra interchangeable barrels and also has the extended grips for added comfort. Bond Arms Bass Snakeslayer features are interchangeable barrels and automatic extractors. Also includes a rebounding hammer, retracting firing pin, crossbolt safety, spring loaded cammed locking lever, trigger guard and stainless steel with satin polish finish.