My son's trap gun is an old 870 that was built form parts - we call it
"Frankengun" , the name was hung on it by my older brother when he worked for a famous Canadian gunsmith in the 60's.
it started out with a gun that came into the shop for parts due to a blow up .
A 20 got mixed in with the 12's and slid forward of the extractor.
When the gun misfired, another shell was racked and - KABOOM!!!
Luckily no one was seriously hurt, but I remember something about broken fingers.
He bought the chassis for peanuts, and salvaged a few screws and springs , scroundged some VERY nice wood with the help of (Ron Bowman of Remington), built a trap barrel from a M58 field gun, plugging the gas vents , installed a rib and shortend the shank, and a skeet barrel from an 870.
He choked the barrels IMP/MOD and SKT2, and I think it was likely George
Poahl himself who put one of the finest bluing jobs on it I have ever seen
This gun has been going strong since, and is a perfectly balanced, lightning quick, work of art!
I will never see field use mind you, it is strictly regulated to the skeet and trap ranges , as it is just too nice to take into the bush or a duck blind!
Cat