SHOT Show 2018: Windham Weaponry .450 Thumper Pistol

by
posted on January 31, 2018
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
winham_lede_450-pistol_white_01s.jpg

Have you been feeling a little blue because you haven't been able to find a semi-automatic handgun chambered for straight-walled, big-bore cartridges like the .450 Bushmaster? Well, cheer up friend! Windham Weaponry has just what you're looking for.

The new .450 Thumper pistol (RP9SFS-450M) features a forged 7075 T6 aircraft aluminum flat-top upper receiver paired with a Magpul enhanced trigger guard lower receiver, both of which are treated with a hardcoat black anodize finish. The 9” long medium-profile barrel is made of 4150 chrome-moly steel, sports a Melonite QPQ finish and has an M4-style feed ramp. The threaded muzzle is fitted with a much needed 3-chamber muzzle brake to tame felt recoil. The 7" long free float 6063 aluminum handguard has M-LOK accessory and QD sling attachment points. The end plate features a QD socket with a sling swivel provided.

This gun ships with a set of Kriss polymer flip-up sights. The smooth, pistol-style buffer tube is fitted with an SB Tactical wrist brace. Other features include a Hogue over-molded pistol grip, one five-round magazine and a hard side storage case. Suggested retail for the .450 Thumper is $1,254.

Latest

Polish Vis 35 Radom Ihtog 1
Polish Vis 35 Radom Ihtog 1

I Have This Old Gun: Polish Vis 35 Radom

One of the lesser-known designs from the 1930s, the Vis 35 Radom is widely considered to be one of the best of the pre-World War II handguns.

Rifleman Q&A: Colt 1860 12-Notch Conversion

"At a gun show, I saw a Colt 1860 Army Richards Conversion with 12 cylinder notches instead of the usual six. The dealer was not sure whether this was original to the gun. Were these extra notches a factory variation or just some frontier gunsmith’s backroom project?"

July 2025 Sees Lowest Gun Sales Numbers In Nearly Six Years

Following a nearly six-year, record-setting run, according to the latest NICS and NSSF reports, firearm sales have dropped just slightly below a million during the month of July.

Review: Extar EP9 Carbine

Sporting polymer construction, partial compatibility with America's rifle, a unique bolt assembly and a no-lubricant-required design, American Rifleman staff decided the Extar EP9 Carbine, in 9 mm, deserved closer inspection.

New For 2025: Springfield Armory Echelon 4.0C Comp

Springfield Armory combined its innovative single-port integrated compensator with its compact striker-fired Echelon 4.0C platform to create an easily carried design that cuts down on recoil.

GrabAGun Targets New Buyers With Digital Firearm Sales Focus

GrabAGun, a Texas-based online retailer of firearms, ammunition and accessories, went public on the New York Stock Exchange on July 16, 2025, receiving $179 million in gross proceeds that the company affirmed will be used to expand its online platform and fund strategic acquisitions.

Interests



Get the best of American Rifleman delivered to your inbox.