I recently purchased a Huldra MkIV 5.45x39 upper. The fit and finish are equal to anything I've seen short of stuff that costs twice as much. I like the fact that it is sold in a basic configuration, allowing me to choose my own components such as handguards and sights. One feature that I appreciate is the ability to turn off the gas system and cycle the bolt manually. I have only been able to perform a function test by dumping 4 mags but hope to get in some range time soon. I topped it off with a Lucid HD7 and Troy backup sights, DOA rear and HK style front. It is sitting on a homebrewed Superior Arms lower with the VLTOR A5 recoil system and EMOD stock. Magpul handguard and MIAD grip, Viking VTAC sling. Please start working with Adams on a 300 Blackout upper!

Stuart or Dave: Should I register the upper or is that only for complete rifles?