Laser Devices Laser Blaster Bore Sleeve 9mm/.38 cal./.357 cal. is a part of the high quality and dependable Laser Sight Accessories from Laser Devices. All of the features you need for a price you want. Laser Sight Accessories from Laser Devices are well known for their quality and Laser Devices Laser Blaster Bore Sleeve 9mm/.38 cal./.357 cal. upholds that standard.