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Harrington and Richardson, now operating under the Palmetto State Armory umbrella, set out to do something nobody else had really done right: build a genuine civilian-accessible clone of the Colt Model 635 submachine gun. The result is the H&R Retro 635, a large-format 9mm pistol that nails the period aesthetic without cutting corners on the parts that matter. You get a fixed carry handle upper, standard carbine 6-hole handguards, an A2 pistol grip, A1-style iron sights, and that signature A1 birdcage out front. It looks exactly like what it's supposed to look like, and that's the whole point.
Under the nostalgia is a legitimately solid setup. The 10.5-inch barrel is made from 4150 Chrome Moly Vanadium steel with a nitride finish for corrosion resistance and durability, threaded 1/2×28 for suppressor or muzzle device compatibility. The bolt carrier runs a straight blowback 9mm profile, which is reliable and ammo-tolerant, though it does cycle with a bit more authority than a gas-operated gun. The trigger is milspec, the receiver is black anodized aluminum, and the whole thing is built to take range use seriously. It accepts all Colt-style 9mm magazines, with ASC and Metalform being the recommended options, and it holds 32 rounds in those stick mags that give the gun so much of its SMG personality.
With a 10.5-inch barrel, the 635 generates noticeably more velocity than a standard handgun, which makes for an interesting 9mm experience. The longer sight radius from the carry handle setup helps with practical accuracy at distance, and the gun has shown solid performance at 50 yards and beyond in real-world testing. The HAR-15 pistol brace is adjustable and designed to visually mirror the old CAR-15 collapsible stock, which ties the whole retro package together. If you're into Colt SMG history, suppressor-ready 9mm builds, or just want something at the range that turns heads and runs well, the H&R Retro 635 makes a strong case for itself.
The 635 is compatible with Colt-style 9mm stick magazines. H&R specifically recommends ASC and Metalform magazines for the best reliability. These are the same style of magazines used by the original Colt Model 635 SMG and are widely available.
Yes, the 10.5-inch barrel is threaded 1/2×28, which is the standard thread pitch for 9mm suppressors and most aftermarket muzzle devices. It ships with an A1 birdcage flash hider already installed, which threads right off if you want to mount a can.
Straight blowback guns like the 635 tend to cycle with a bit more felt recoil than gas-operated AR-pattern rifles because there is no locking mechanism absorbing any of the rearward energy. It is completely normal and expected, and the upside is that blowback 9mm guns are generally less finicky about ammunition than gas-operated alternatives. Think of it as a more spirited range experience.
It ships with the H&R HAR-15 adjustable pistol brace, which is designed to visually mimic the classic CAR-15 collapsible stock and really sells the retro aesthetic. It is adjustable for length and includes a QD sling port.
It is a solid suppressor host for a 9mm AR-style pistol. The 10.5-inch barrel already gives you a velocity advantage over a typical handgun, and the 1/2×28 thread makes it compatible with most 9mm cans on the market. The straight blowback operation can increase back-pressure with some suppressors, so it is worth checking with your suppressor manufacturer if that is a concern.
It is one of the most visually accurate civilian clones of the Colt 635 available. The fixed carry handle upper, 6-hole carbine handguards, A1 birdcage, A1-style sights, and Colt-pattern magazine compatibility all mirror the original closely. The receiver markings are laser engraved to mimic the original H&R roll marks, giving it a period-correct look from nearly every angle.
| UPC | 810141220928 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | HR51655158977 |
| Action | |
| Barrel Length | 10.5" |
| Caliber/Gauge | 9mm |
| Capacity | 32 |
| Color | Black |
| Model | |
| Product Type | AR |
| Safety | Manual Safety |
| Shipping Weight | 8.2 |
| Sights | Iron Sights |
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