There are no barrel length limits for rimfire semi-autos (provided the barrel is manufactured at that length), but you need to maintain the 26" OAL as mikeystew says.
Mark
Thats not completely accurate... while an overall length of 26" MUST be maintained, there is a minimum barrel length... which is approxiamtely 4 1/8" (105mm)... not that anyone would want a four inch barrel on a rifle???![]()
A handgun barrel must exceed 105mm. If the thing has a buttstock, and is over 26" overall, is it a handgun?



























