The Mk12 SPR was a NSWC Crane project. Every branch has something similar now for a designated marksman rifle, maybe even a Mk12 but if it doesn't have the Mk12 barrel and Ops Inc 12th model suppressor, it isn't a Mk12 by definition. Don't the Marines run the SAM-R?
The authorities in the subject?
Chief Monty LeClair, Navy SEAL and owner of Centurion Arms along with Kevin O'Neill who co-owns High Caliber Sales and employs AJ Brown who was an engineer tech at NSWC Crane Division for 25 years and worked on the Mk12 project. Both are authorities and coincidentally are the only two companies selling 100% genuine Mk12 SPRs (the barrel is the hardest part to obtain, if you're going for a 100% authentic copy) to the civilian market. I talked with Monty at length years ago when he first started his business but his Mk12 builds were over six months backlogged and I wasn't aware of HCS so I ended up with an almost-Mk12 from Wes Grant of MSTN (who is no slouch himself) and a custom Mk12 barrel profile done on a Noveske blank. The suppressor itself took about a year to track down as its a fairly small company that tailors to military contracts and has a very small trickle of product that makes it into the commercial market.
The Mk12 is also a well documented project with various historical revisions and with known parts build list. It isn't anything confidential or secret and 95% of the parts can be easily obtained.
