found this in a website.
Armament
The A-26B Invader shined when it came to its armament loadout. More noticeable was the battery of 6 x 12.7mm (.50 caliber) heavy machine guns (early block A-26B models ) all allocated in the nose housing. Later block B-26Bs featured a total of 8 x 12.7mm nose-mounted machine guns. This assembly allowed the Invader to make devastating strafing sweeps on enemy ground targets with usually destructive results, combining the concentrated power of six to eight heavy caliber machine guns into one focal burst of hot lead. In addition to the nose armament, two 12.7mm machine guns were held in a dorsal barbette while another two were featured in a ventral barbette. The ventral barbette was sometimes removed in favor of an additional fuel cell. Invaders could also sport 8 x underwing gun pods and 6 x 12.7mm machine guns mounted in each wing leading edge (three guns to a side) along with blister mounts on the fuselage sides - all concentrated in a forward-firing position. With a single burst of the all machine guns, the entire aircraft would buffet violently rearward, a consideration for the crew to keep in mind in terms of their own safety. In total, a given A-26 could sport as many as 22 x 12.7mm machine guns with up to 6,000 rounds of ammunition.
The Douglas Invader's lethality was furthermore accented by the option of carrying between 4,000 and 8,000lbs of internal and external ordnance in the form of drop bombs or 8 to 14 x 5" rockets (the latter held externally on eight or fourteen underwing pylons - the full 16 rocket deployment was achievable in lieu of the drop tanks and wing mounted bombs). In fact, Invaders were known to be able to carry greater bombloads than that as found on the larger Boeing B-17 Flying Fortresses. Endurance could be extended with the addition of 165-gallon underwing drop tanks, increasing the aircraft's range by up to 300 miles. C-model Invaders with the glassed-in nose were fitted with 2 x 12.7mm machine guns in the nose along with the 2 x 12.7mm gun systems in each turret but forward firepower was augmented with the addition of the 6 x wing-mounted machine guns.
semp
