HK Army Lazr Tip - 15 Inch - Dust Black Barrel Accessories then as shown in step

then as shown in step 4

SP Shocker XLS Blade Trigger

6-32 x 3/16" set screw x8

Ultra Compatible - Works With Compressed Air

HK Army Lazr Tip - 15 Inch - Dust Black Barrel Accessories then as shown in stepHK Army Lazr Tip Crafted with accuracy and style in mind, the LAZR Barrel Tips delivers unrivaled performance. The precision barrel bore honing used in the development of the LAZR barrel gives improved diameter uniformity, a quieter shot and a smooth interior finish. This attention to surface detail will deliver you the ball on ball accuracy you are looking for in a high end barrel. Details Highest Quality Aluminum Barrel Tip Special designed porting