For sale is a lightly used Storm Lake 9mm threaded conversion barrel in black isonite finish (4.25 standard full size). I put exactly 100 rds through this barrel with no issues, in fact I enjoyed the 9mm so much I went out and bought a Full Size 9mm which is why this is up for sale. I will include one S&W factory 17rd magazine (if law allows in your state), which was used for the 100 rds fired. This is all you need to convert your full size .40 or .357 sig S&W M&P to fire 9mm, threaded barrel also makes it ideal for suppressing. $180 shipped Priority Mail. Paypal or money order. No trades, email in profile.***SOLD***