Welcome to Librarium Online!
I'm not following.
On these photos from FW site bolter :
a - preventing main weapon to rotate and to shoot straight ahead
b - preventing main weapon to shoot straight ahead (without blowing up same bolter)
Perfect modeling lesson for new 40K players
You could take the storm bolter turret off and model a Marine's arm poking out of the hull, with a bolter in his hand. It'd be good for a laugh!
"My tanks have names, my men have numbers." -Col. Edmund Grahvess, 23rd Kronecker Prison Guard
Did that with a few Tank commanders in the past. Either wielding storm bolters or Missile Launchers to represent Hull mounted options. Looks far cooler and you don't get silly silliness like in the pics!!
Drive me closer!
I want to stab them with the bore of my turret.
Honestly, just stick it to the top of the turret =P
40k: Silver Angels of Our Martyred Lady 7/2/3 - Daemons of the Great Squiggle! 3/1/0
Fantasy: Windhost of Athel'Loren 2/0/0 - Daemons of Another Great Squiggle! 0/0/0
Warmahordes: Legion of Everblight (Absylonia)