H&R Retro M16A1 barrel assembly 1/12 twist w/M4 Feed Ramp

H&R 20" pencil barrels. Parkerized with Chrome bore. M4 style barrel extension, and rifle position gas port. Gray anodized slip ring. Muzzle is threaded 1/2x28. Perfect for a Retro or K.I.S.S build. 1/12 twist. Comes assembled with everything except handguards, gas tube, and gas tube roll pin.