i got mine from copes. had to chop off the muzzle brake it was corroded on. soaked for 3 wks in penetrating oil and even took a torch to the sucker it would not come off. Whomever this rifle was issued to never clean the sucker.
I have 2 from Cope's and they are great. Model 1 sales has them too but no mag or bipod IIRC $325, not on website must call them.
I have built a handfull some rough looking early models and some pristine newer kits. They all shoot great.
The brakes are buggers but I have not ran into one yet that I could not remove. The corrosive ammo. shot by the Polish aids in this problem causing the barrel to rust to the brake. All needed the barrel trunnion mounted up in a good vice and given liberal amounts of penetrating oil and a propane torch heating the base of the brake near the FSB where the threads are. They were most likely installed under tight tolerances not intended for removal. Use a large flat shafted screwdriver in the brake hole it is a LH thread and work it back and forth little by little after heat then oil. You will have a smoking mess but it will release for you if you take time. You may need to do this process over a day or two letting the steel cool down between tries. None of the ones that I did took more than 30 minutes. Patience is a key.
Building a Tantal from a kit is easy with the NDS-2T as the holes all line up with the factory drilled trunnion holes. :grin: