BlueLineFish 615 Posted February 5, 2012 If you purchase a 9 mm can you get a .40 slide and barrel or do you just need the barrel. Or can you not swap at all. Quote Share this post Link to post Share on other sites
lunker 274 Posted February 5, 2012 Don't know the answer but I know that a 40 barrel won't work on a 9mm slide because the 9mm breechface is too small for the 40 bullet. Quote Share this post Link to post Share on other sites
BlueLineFish 615 Posted February 5, 2012 In doing more research it seems that if you buy a .40 you cn just get .357 and 9 mm barrels. Seems factory barrels will work just fine but there are also storm lake conversions Quote Share this post Link to post Share on other sites
lunker 274 Posted February 5, 2012 357 Sig is a necked down 40 case. It will work in a 40 slide and 357 barrel. Remember the point of impact will be an inch or so higher at 10 yards due to the velocity difference. A 9mm barrel may work, but remember the extractor, ejector, and breech are all designed for the larger 40 case, so reliability may suffer. Quote Share this post Link to post Share on other sites
Old School 611 Posted February 5, 2012 In doing more research it seems that if you buy a .40 you cn just get .357 and 9 mm barrels. Seems factory barrels will work just fine but there are also storm lake conversions Yep KKM sells conversion from 40S&W to 9mm as well. So I guess it works. Quote Share this post Link to post Share on other sites
TheLugNutZ 21 Posted February 5, 2012 All you need is the barrel as said if you own a .40. That and mags. The 357 & 40 share the same mags. Quote Share this post Link to post Share on other sites
BlueLineFish 615 Posted February 5, 2012 More interested in the 9mm conversion from .40. So just barrel and mags. Seems easy enough Quote Share this post Link to post Share on other sites
Babaganoosh 192 Posted February 5, 2012 Picking up the pro in 40 this week. Quote Share this post Link to post Share on other sites
Old School 611 Posted February 5, 2012 More interested in the 9mm conversion from .40. So just barrel and mags. Seems easy enough I'm nor intimate with the M&P line but just a heads up. Because of differences in case diameter be cautous of the extractor and ejector locations when using a conversion barrel. Quote Share this post Link to post Share on other sites
twitchn1911 1 Posted February 12, 2012 the frame is the same for the 9mm and .40 so YES you can swap the slide and barrel. and if you have a .40 you just need a 9mm barrel and mags, but you can't use .40 in a 9mm slide. Quote Share this post Link to post Share on other sites