Does anyone know why Stag Arms, apparently several years back, discontinued the Model 8HL?  I have one and am unable to get spare parts for it.  I have only fired it a few times, and now it's just a safe queen.  Was there a lack of consumer demand for it?  Any design flaws or endurance problems?  I called their Customer Service; the tech never really gave me an answer.  He did say they can service it, which suggests to me the company is sitting on spare parts (e.g. left-hand bolts and BCGs), but won't sell any spare parts.

I would say if the design is similar to the Adams system. You could get away with x amount of part from Adams system.  But this is based on a SWAG.

Try post pics of the Stag parts that you want to get as spares. I am curious how close or unique the parts are in comparison to another company design.

the stag system was based on the cmmg piston system