Concurring Opinion by
Mr. Justice Roberts:I agree that the judgment of sentence should be affirmed. Appellant’s guilty plea was voluntarily and understanding^ tendered and properly accepted by the trial court. Commonwealth v. Maddox, 450 Pa. 406, 300 A.2d 503 (1973); Pa. R. Crim. P. 319, 319A; ABA Proj*438ect on Minimum Standards for Criminal Justice, Standards Eelating to Pleas of Guilty §§ 1.4-.6 (Approved Draft, 1968); ABA Project on Standards for Criminal Justice, Standards Eelating to the Function of the Trial Judge §§ 4.1-.2 (Approved Draft, 1972). Ms plea was entered as a result of a plea bargain, not as the result of an allegedly illegal pretrial confession. See Santobello v. New York, 404 U.S. 257, 92 S. Ct. 495 (1971); Commonwealth v. Alvarado, 442 Pa. 516, 276 A.2d 526 (1971); Commonwealth ex rel. Kerekes v. Mahoney, 423 Pa. 337, 223 A.2d 699 (1966).
Mr. Justice Nix joins in this concurring opinion.