I have 17-4 stainless low profile gas blocks for sale. I designed and built 100 low profile gas blocks. I am getting out of the business. Theses are in the white. Set screws come with them. These are for .750" barrels. I will ship to where ever. Prices are 1 for $25 and 10 for $20 a piece. Pictures are now posted. Send me an email if interested.