I picked up a new YHM clamp/bolt on gas block/flip up front sight for my AR pistol build and it simply won't work with the pigtail gas system. I mounted it, tested it, it wouldn't align with the gas hole on the Bbl, so I took it off.
The upper is a stripped Cerro Forge marked ("Keyhole" marked) A2 upper, and it's pretty much in new condition...(I'm not even sure if it's been fired or not.)
What I need is a flattop gas block that pins into place the same as a normal "triangle" sight base/FSB. I'd prefer steel over alum. Finish isn't really a concern, as long as it's not abused.
Any matching pair of flipup frot sight/BUIS is fine, as long as the front sight is NOT designed for the HG rail system and is designed for the flattop FSB.
If you're not intrested in what I have to trade, I have someother trading options here.
Direct all questions/offers to IM or e-mail please.