TacFire SSPK9MMLPK7K AR Build Kit 9mm Luger Pistol Black 7.5 Barrel. 5" Barrel - TacFire's 9mm AR pistol build kit with LPK includes: 9mm 7.5" barrel; 9mm bolt carrier group; Mil-Spec upper receiver; 7" Slim free-float KeyMod handguard; complete lower...