Stripped 20" Emco M16A2 gov't profile barrel, chrome lined, 1:9 twist, MP tested, 5.56 NATO chamber, had for several years but I'd estimate that I shot less than 500 rounds through it. Excellent finish. Has M4 feed ramps on barrel extension to match up with the receiver it was on. $180/shipped, USPS money order or discreet PayPal. Please post an "I'll take it" and follow up with my by IM.