I sold mine last year for just over $5k. That seems to be the going rate in Canada if one becomes available. Anything more and you are REALLY getting ripped off. Considering the upper kit from HK is only $1600 or maybe less!
I wonder if the bare receiver is available some how as a replacement part. If that were the case, someone could easily swap the parts over from an MR223.
The ability to use standard AR lowers is nice, then you don't have mag fitting issues and a replacement is easily found if required. When it comes to tactical rifles, options is better then no options any day!
My advice, save your money. The rifle was really nice but had some design features that I did not agree with.
- Non standard top rail height
- Proprietary Handguards
- Rear loading piston (requires removal of handguards to clean)
- 10.4" weighs as much as most 16" DI rifles