I know there's a HTA bullpup "In general" thread, but I hate to dive into 1300+ replies to search for scattered answers and discussions of this topic. So, I going to build a custom 995 bullpup! OK, stop laughing. I bought a beater, monkey stock 995 for THAT purpose and win or lose, I will try. If I win, cool. If I lose, the remains / parts will be sold here at a great discount!! Sight lines: The sight line of the 995 is about 1-3/4" above the cheek rest area of the classic stock. The cheek rest area of the HTA MBS is about 1" higher than the classic stock CR area. It appears on the HTA that the top rail is just slightly above the cheek rest area. Will AR15 rail sights be a proper height for the HTA stocked HP? Are AR15 rail sights offered in different heights? I've researched this some and it seems a sight is a sight regardless of AR configuration and caliber. Anyone know the general sight line height of AR sights above the rail? Will a rail riser need to be used on a HTA to get the sights to a taller height? Optics: Same as above. What do you use on a HTA MBS and/or what lines up properly? RE: My custom BP, at this planning stage time. I'm looking at using the Leapers UTG flip up sights. Metric FAL grip and sectioned lower w/ custom built trigger. Mini forward grip Square barrel shroud will have full length Picatinny rail on top and sides will be machined w/ M-Lok slots. Metric or Inch FAL forward mounted charging handle. Frame cover, slide and barrel shroud - misc square tubing and farm junk. Optics?