The law of inoperable firearms in Mass:
A weapon that was originally a (firearm) (rifle or shotgun) may become so defective or damaged that it will no longer fire a projectile, and then the law no longer considers it to be a (firearm) (rifle or shotgun). But a weapon remains a (firearm) (rifle or shotgun) within the meaning of the law when a slight repair, replacement or adjustment will again make it an effective weapon. Commonwealth v. Colton, 333 Mass. 607, 608, 132 N.E.2d 398, 398 (1956) (insertion of ammo clip); Bartholomew, 326 Mass. at 220, 93 N.E.2d at 552 (insertion of firing pin); Commonwealth v. Raedy, 24 Mass. App. Ct. 648, 652-656, 512 N.E.2d 279, 282-284 (1987) (jury question whether gun that could be fired if inverted was “firearm”; judge who distinguishes between “major” and “minor” repairs need not instruct that Commonwealth must prove that this particular defendant had ability and knowledge to repair gun); Commonwealth v. Rhodes, 21 Mass. App. Ct. 968, 969- 970, 489 N.E.2d 216, 217 (1986) (not a firearm where bent part rendered inoperable until repaired). See Commonwealth v. Gutierrez, 82 Mass. App. Ct. 1118, 977 N.E.2d 105 (No. 11-P-1612, October 25, 2012) (unpublished opinion under Appeals Ct. Rule 1:28) (noting objective “slight repair” standard for operability of firearm).