Fusion Engine Installation Shim Kit

• High-quality shim kit consisting of four brass shims
• Designed to aid in proper nozzle alignment
• Includes the most commonly used sizes: 1pc 0.020″, 1pc 0.025″, 1pc 0.032″, 1pc 0.045″
• Shims can be sanded down for precise fitment if needed
• Not all rifle models are designed to the exact same specifications
• Some models may require minor modifications for perfect fitment
• One common modification is shimming the engine in the receiver to center the nozzle in the barrel
• In rifles where the bolt secures the buffer tube directly into the back of the engine, it may pull back on the engine, lifting or pushing down the nozzle
• Visual inspection of the nozzle's gap around it can determine if adjustment is needed
• Adjustment spaces can be installed to adjust the nozzle position