Double your pleasure and double your fun with a genuine Olympic Arms pistol caliber conversion for your AR15 rifle. We can supply full auto or semi auto conversions in 9mm, 10mm, .40 S&W, and .45acp. Each one comes with one mag and a complete upper receiver assembly ready to put on your lower in about 2 minutes. Semi auto can be had in pre or post ban for $699. The pre-ban unit comes with an 11-1/2” barrel and long flash hider or 16” barrel with flash hider. The post ban is 16” and can have a muzzle brake included for an additional $30. Full auto units require a copy of your form 4 and are $750 with 11-1/2” barrel. Shipping is $15. Bank checks and credit cards, (price reflects 4% cash discount,) are accepted. These uppers are built to your specifications.