From the press release …

MasterPiece Arms, manufacturers of the MPA MAC Line of semi-auto submachine pistols and carbines, , is introducing four additional sound suppressors to the existing line of .22LR suppressors. MasterPiece Arms, a world-class manufacturing facility with over 39 CNC machines and TS16949 Quality Control System, are the sole-source engineers and manufacturers of all of the MPA Sound Suppressors; no components are outsourced.

The 5.56mm/.223, .308/ 300aac Blackout (7.62), 9mm and .45 ACP sound suppressors are machined out of 304L stainless steel and finished with a high temp coating to minimize glare and provide a durable, protective finish. MasterPiece Arms sound suppressors all offer the user the lowest decibel reading on the MPA test equipment under the most ideal testing parameters providing for a comfortable sound experience.

Like all Masterpiece Arms products, the new sound suppressors offer the MasterPiece Arms Lifetime Guarantee.