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

attack in a back alley
attack in a back alley

Cold Performance: How to Prepare for the Uncertainty of Self-Defense

Defensive gun use is defined by uncertainty. You don’t know when it will happen, how far away the threat will be, how many threats you will face or what position you will be in when it begins.

Derya Goes Silent: The OBone Suppressor

In 2025, Turkish manufacturer Derya Arms opened a new facility in Florida, enabling the company to produce a number of new products domestically, such as its new OBone suppressor.

The Armed Citizen® Oct. 26, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Rifleman Q&A: Understanding a Firearm's Cycle of Operation

The cycle of operation is the mechanical sequence of events that it takes to fire one shot out of a firearm. If one of those steps fails to take place as designed, there is an interruption in the cycle of operation and the gun stops firing.

Review: Sightmark Pinnacle 1-6x24 mm Riflescope

Looking for a performance LPVO without the usual associated cost? The Sightmark Pinnacle 1-6x24 mm might be your answer.

Myths & Misunderstandings About the “Modern Fighting 1911”

The Colt Model 1911 pistol and its derivatives are among the most iconic military handguns ever made. But in 2026, does the M1911 still hold up as a quality defensive arm?

Interests



Get the best of American Rifleman delivered to your inbox.