This is another of the Bergman designs printed under licence by [chcha_5648] and sold on eBay for £12.
I filled large 3D Print lines in with Milliput and just used a thick undercoat to hide the finer ones.
The BMP was the world's first IFV, designed to transport Soviet infantry through radiation soaked battlefields on their way to the Rhine. More than 40,000 were manufactured and they still turn up all over the world in modern wars. The main weapon is a strange, 73 mm, low-pressure smoothbore firing an RPG out to about 500 m. Later an explosive shell was provided which was far more useful.
An AT-3 'Sagger' launcher was mounted over the gun but this was next to useless in practice so they were often removed. Later upgrades have all sorts of improvements, 30 mm autocannon, AT-3 or AT-5 ATGM, automatic grenade launchers etc.
There is very little room inside because the vehicle was designed to be ground hogging, partly to make it inconspicuous and partly so it would not be blown over by nuclear blasts. In the real world they are always festooned with baggage of various sorts or the baggage is inside and the passengers ride on top - a much safer proposition in modern wars where mines and IEDs are the primary threat.
The kit comes in two pieces, a hull and a rotating turret.
You get the choice of two turrets included in the price, with or without the Sagger.