H and R Retro 635 Features The H and R Retro 635 uses a 9mm blowback operating system paired with a lightweight profile barrel made from 4150 chrome moly vanadium steel giving the carbine a reliable cycle without the complexity of a locked breech design. The 16 barrel carries a 1:10 twist rate and a nitride finish for corrosion resistance and is threaded 1/2x28 to accept a compensator or suppressor beyond the factory 9mm A1 birdcage. A forged 7075-T6 slickside upper receiver keeps the profile true to the original AR SMG styling while benefiting from modern manufacturing tolerances. The H&R Retro trigger provides a period-correct feel while retaining the reliability shooters expect from a modern production carbine. An A2 style grip and a 6-hole carbine handguard complete the retro-inspired furniture while a 9mm brass deflector keeps spent casings clear of the shooter s face during rapid strings of fire. The carbine accepts Colt-style pattern magazines with ASC and Metalform units specifically recommended by the manufacturer for reliable feeding. Anodized black finish covers the receiver for a durable low maintenance exterior that resists wear from range use and handling. With its 9mm blowback bolt carrier and forged receiver the H and R Retro 635 gives shooters an authentic retro carbine experience backed by dependable modern construction. H and R Retro 635 Specifications Brand: H and R Model: Retro 635 Type: Modern Sporting Rifle Caliber: 9mm Capacity: 32 Rounds Barrel Length: 16 Barrel Description: Threaded Lightweight Profile Barrel Material: 4150 Chrome Moly Vanadium Twist Rate: 1:10 Muzzle Thread Pattern: 1/2x28 Muzzle Device: 9mm A1 Birdcage Receiver Material: Forged 7075-T6 Receiver Type: Slickside 9mm Handguard: 6 Hole Carbine Grip: A2 Style Color: Black Finish: Black Anodized Trigger: H&R Retro Trigger Sights: Iron Sights Compatible Hosts: Integrated Scope Mount Available At: GrabAGun