This is the Trumpeter kit I am looking to get.
![](../../../i.imgur.com/ngKa7HA.jpg)
I need the Height and width dimensions for the front of the Trumpeter gun housing.
![](../../../i.imgur.com/Z9TvhT5.jpg)
Here is the measurement for the base of the Academy M61 cannon. It is 3/10" diameter or roughly 7.5mm.
![](../../../i.imgur.com/TK81gVp.jpg)
I plan on replacing the Academy kit barrels with the Master Model metal ones which are slightly shorter than the Academy barrels. Here is the length of the Academy kit barrels. Will the barrels stick out past the front of the turret or be even with the front or will they be shorter? The length of the Academy barrels with the mounting plate is 1 - 9/10" or roughly 47mm long.
![](../../../i.imgur.com/Lw5xg8t.jpg)
Here you can see the Master Model barrels are slightly shorter than the Academy kit barrels. Image courtesy of the IPMS USA Review page.
https://web.ipmsusa3.org/sites/default/files/reviews/m61-vulcan-20mm-rotary-cannon/m-61_compare2.jpg