thumbpiece

thumbpiece

(ˈθʌmˌpiːs)
n
a piece that is pressed by the thumb, for example on an instrument or on a lid so as to open it
References in periodicals archive ?
Since there is no Volquartsen MK I grip, there will be a void in the grip to accommodate the bolt stop thumbpiece (A04700) of the Mark II.
Unloading is accomplished by lining up a chamber with the ejector rod and pushing the ejector rod thumbpiece toward the rear, forcing out a fired case or unfired cartridge, and then rotating the cylinder to line up the next chamber.
111,000) while the 'Sporting' over and under design with quick-detachable selective single trigger-lock assembly, top lever opening, with non-automatic thumbpiece safety incorporating a barrel selector, begins at GBP 45,000 (approx.
Its markings include a thumbpiece with the cipher of Czar Nicholas I, and the buttplate tang has a rack number and the Russian imperial double eagle.
Sporting pinned partridge front sights, wide classic thumbpiece, and checkered square-butt walnut grips, along with a 6 1/2-inch barrel--arguably the best N-frame barrel length ever.
Such examples are two rare George II flagons dating from the second quarter of the 18th century, each with a hinged lid operated by a scrolled thumbpiece.
Draw the hammer to the cocked position (you'll have to pull the thumbpiece to the rear), then lift it from the frame.
Even complicated shapes like the thumbpiece inlays show no gaps, looking as if the wood grew around them.