In October, 1946 Novosibirsk factory #153 started the serial production of the last and the most perfect modification of the fighter Yak-9 – Yak-9P. The distinctive feature of this modification of Yak was all-metal construction of glider, which ensured its prolonged service life. Among the other improvements was the enlarged number of equipment, which made piloting easier even in complicated meteorogical conditions and made its possible to mount guns with the caliber of 23, 37 and 45 mm quickly in field environment. The serial production o Yak-9P was stopped in December, 1948.