Description Light to medium duty use Booster inside Incredibly lightweight yet delivers full-size sound suppression performance Ideal for hunting, precision, .28Cal Caliber Specification: Material: Full Stainless Steel Overall Length: 6.6″ Outer Diameter: 1.34″ Caliber: 7.2mm/0.28″ Shortest Length: 3.3″ Thread Protector: 1/2-28 and 5/8-24 Reminder: Only suitable for professionals. Non professional, please don’t buy. Cannot return or exchange after use. Product Includes 1 x Adaptive Solvent Trap Tube(Booster inside) 7 x Cone Cup 1 x Thread Protectors (1/2-28 or 5/8-24) 1 x End Cap Recommended Suppressor Bore Size Caliber Diameter Over Bore Bore Drill Size .22 Caliber 0.224 0.057 0.281 9/32 9mm 0.355 0.067 0.422 27/64 40 S&W 0.4 0.069 0.469 15/32 45 ACP 0.452 0.0636 0.5156 33/64 .450 Bush 0.452 0.0793 0.5313 17/32 .458 Socom 0.458 0.0733 0.5313 17/32 6.5 Gren 0.264 0.0641 0.3281 21/64 6.5 Creed 0.264 0.0641 0.3281 21/64 .30 Caliber 0.308 0.067 0.375 3/8 .338 Lapua 0.338 0.0682 0.4062 13/32 .50 Beowulf 0.5 0.0625 0.5625 9/16 5/8×24″ Thread Protector Compatible Calibers .308 45 ACP .40 30-30 30-06 300 333 Lapua 6.5 Grendal 1/2×28″ Thread Protector Compatible Calibers .22 9mm 17HMR 5.7×28 5.56 .223 .243 .270