Boss/STX barrel extension 600-700mm

Thanks Jimmy, its longer than the original but leaves the full flats of the stock end piece exposed. That end cap/liner holder is the stock piece.

Yeah hopefully get a chance to shoot some targets this weekend. Only have my MP slugs and a variety of pellets in .25 so far. Some varmint knockers on the way.

Hmmmm, and this will help to gain some FPS ??? Hmmmm. What inside Diameter does this have ?

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For .25 I had the ID made to 9.5mm. If theres any interest I might be able to have him make more. In .22 or .25 or .30 in aluminum or steel. PM me if interested anyone. Can probably make 5 to 600 adapters, 6-7 or even possibly 5-700 adapters.

Yeah usually longer barrels give more fps, well documented.

Glem, excuse my ignorance here. I have a .22 Crown with 500mm barrel and shroud. So with this extension, I could buy a 600mm liner and use that? But not use the Shroud, or use the shroud but extended? Does the normal end piece screw into the extension? Thanks much,

Mike.

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Yes that's exactly what it's for, no need to buy the full kit if you just want to use a longer liner and keep the same caliber. Stock threaded end piece still works. I have no experience with shrouds but edosan would know that as he I think used his shroud.

Has the same OD as factory so shroud would probably work but be 100mm further down the barrel towards muzzle.

Yeah no problem, kind of an experiment worth trying to me. Hopefully shoot some pellets and my heavy 47gr slugs I made with mp molds a bit tomorrow. Got some swaged ones on the way.



They chamber beautifully, I shot a few through the A pellet liner. Was snug but workable.