i installed this rod & stock spring assy. after shooting one mag as i carry the G-36.the accruacy improved to the point i thought i had a target pistol.i shot H&G-68,H&G-292 & different HP & some Fed.EFMJ IN 165gr.the best accu. was Win. PDX-1.this product will stay in my carry gun.the service was very good & Bill is good to work with.