The court properly denied defendant's suppression motion. There is no basis for disturbing the court's credibility determinations, which are supported by the record (see People v. Prochilo, 41 N.Y.2d 759, 761).
The verdict was based on legally sufficient evidence and was not against the weight of the evidence. The People proved the operability of the gravity knife which formed the basis of defendant's conviction of criminal possession of a weapon in the third degree (Penal Law § 265.00; § 265.01[1]; § 265.02[1]). A detective twice demonstrated the operability of the weapon in open court, and the fact that the knife malfunctioned on some of the detective's attempts to operate it did not defeat the proof of operability (see People v. Cavines, 70 N.Y.2d 882; People v. Velez, 278 A.D.2d 53, lv denied 96 N.Y.2d 808).
Defendant's remaining contentions are unpreserved and we decline to review them in the interest of justice.
THIS CONSTITUTES THE DECISION AND ORDER OF THE SUPREME COURT, APPELLATE DIVISION, FIRST DEPARTMENT.