MasterPiece Arms MPA30SST 30SST: Masterpiece Arms9MM Defender SERIESa Side cocking Picatinny top rail designa Short lower receiver Picatinny raila Parkerized metal finish a Quick mag release lever a Compatible w/STEN mags a Includes black barrel extensionDEFENDER Series Common FEATURESa Semi-Auto a Improved hammer design w/spring-loaded disconnect a Fully machined 6061-T6 aluminum finger-grooved pistol grip & lower w/built-in QD flush cup for single point sling & stock attachment interface a Black \"Decal Grip\" panels a MasterPiece Arms Precision threaded barrel made in-house a Front & rear adjustable sights a Quick mag release a Made in the USA a Lifetime Warranty a Includes (1) polymer mag & gun case