I bought a dirt cheap pump shotgun to mess around with; paint/mod etc... When I first applied the ATI heat shield it would NOT stay in place; purchasing dual sided mounting tape for the heatshield was a must for me. After installing the shield WHERE I WANT IT; I recognize I will need to grind down the nut that secures the barrel so I can switch barrels. I purchased the combo... This gun heavy... Barrels are very thick... I will say though I like the gun... I'll try to attach a pic.