Adams Arms threaded barrel for the Glock 19, gen. 1 thru 4 and Glock 45. 3.70".  Slab sided, with barrel nut. Has had 50 rounds through it. 1/2 X 28 thread pitch. Black Nitride finish. Cash only, no trades. Must be 21 yrs old to purchase. Text 928-848-6740.