How is it secured at the back end, next to the receiver?
I ordered the Mossberg heat shield for the 590A1 with the heavy barrel (part #16335P, $30 plus shipping.) to give it a shot. Mossberg also sent the nuts, screws and spacer (not used) with the heat shield. I have the Big Dot installed and the heat shield needs to slide down the barrel to go on. I cut a slot for the Big Dot. It is long enough for the heat shield to fit over the Big Dot when the front restriction is at the muzzle. I rounded all the corners of the slot. This way I just place the heat shield on the barrel and slide it to the rear in place. I also had to reduce the rear corner of the screw hole plate so it would clear the magazine cap. The heat shield is long enough to fit flush with the end of the muzzle. I used Brownell's Dicropan T-4 Touch Up Cream to blacken the bright steel areas from the cutting and filing. To remove the barrel just unscrew the magazine cap while sliding the barrel forward at the same time. To install the barrel place the magazine cap in place with the barrel forward and move the barrel to the rear while turning the magazine cap into position. The Big Dot clears the heat shield so it can still be used if needed. The stud sticking up in the rear heat shield photo and the full Shockwave photo is part of a C clamp I used to install the heat shield. There may be a problem with the heat shield shifting under recoil and trying to come off the barrel. I'll have to try loc-tite under the front band if that happens
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I ordered the Mossberg heat shield for the 590A1 with the heavy barrel (part #16335P, $30 plus shipping.) to give it a shot. Mossberg also sent the nuts, screws and spacer (not used) with the heat shield. I have the Big Dot installed and the heat shield needs to slide down the barrel to go on. I cut a slot for the Big Dot. It is long enough for the heat shield to fit over the Big Dot when the front restriction is at the muzzle. I rounded all the corners of the slot. This way I just place the heat shield on the barrel and slide it to the rear in place. I also had to reduce the rear corner of the screw hole plate so it would clear the magazine cap. The heat shield is long enough to fit flush with the end of the muzzle. I used Brownell's Dicropan T-4 Touch Up Cream to blacken the bright steel areas from the cutting and filing. To remove the barrel just unscrew the magazine cap while sliding the barrel forward at the same time. To install the barrel place the magazine cap in place with the barrel forward and move the barrel to the rear while turning the magazine cap into position. The Big Dot clears the heat shield so it can still be used if needed. The stud sticking up in the rear heat shield photo and the full Shockwave photo is part of a C clamp I used to install the heat shield. There may be a problem with the heat shield shifting under recoil and trying to come off the barrel. I'll have to try loc-tite under the front band if that happens
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