Mossberg Model 640KC Chuckster .22 WMR Bolt-Action Rifle, 24-Inch Barrel, Walnut Monte Carlo Stock
The Mossberg 640KC Chuckster is a bolt-action rimfire rifle built during the late 1960s to early 1970s and chambered in the then-new .22 WMR cartridge. This variant combines an accurate 24-inch AC KRO-GRUV micro-rifled barrel with a classic walnut Monte Carlo stock, giving shooters a flat-shooting small-game rifle that remains comparatively scarce in the Chuckster lineup.
Condition
Overall Condition: Good – Shows light signs of prior use and handling.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Rifling: Good – Intact, well-defined lands and grooves.
Specific Condition Notes: Light surface scratches and handling marks are present on the blued metal and walnut stock, consistent with normal field use.
What’s Included
- Mossberg Model 640KC Chuckster bolt-action rifle
- One factory 5-round detachable steel magazine
The 640KC features Mossberg’s AC KRO-GRUV eight-groove micro-rifling, paired with a 1:16 RH twist to stabilize .22 WMR bullets for reliable accuracy. A recessed crown protects the muzzle during field carry.
The blued steel receiver comes with integral 3/8-inch dovetail grooves for rimfire scopes and is drilled and tapped for an aperture sight, giving the shooter multiple sighting options straight from the factory.
Walnut furniture includes a Monte Carlo comb, a right-hand cheekpiece, pressed checkering for grip, and white-line spacers that capture the period styling of late-60s rimfire rifles. Length of pull measures 14 inches for a comfortable shoulder fit.
Iron sights remain intact: a ramp front blade and folding leaf rear provide a clear sight picture when optics are not installed. A manual lever safety sits conveniently behind the bolt handle for straightforward operation.