I am changing the BUIS set up on my 9mm SBR. As a result, I have a set for sale. \n\nGG&G M.A.D. rear sight. This is the non-locking model. Excellent condition. $90.00.\n\nYHM gas block mounted flip up front sight. This is the locking model which locks in the upright position. Excellent condition. Sell for $60.00\n\nBuy the pair for $145.00.\n\n\n\nI accept, and prefer, PayPal (add 4%) or POSTAL money orders. Thanks!