You are starting down a long and slippery slope which will become expensive as you acquire M21's.
No one M21 will suffice for everything you have listed.
For Skeet, there is the M21 in 'Skeet' that comes with 26" or later 28" barrels.
For Trap, you have the Trap model.
Do not confuse these with the early Skeet and Trap Grade guns.
My 16 gauge 26" Skeet Grade had no pad and that was Factory standard.
I would have a pad as I got beat up with it. Swing was great and also was a great upland game gun.
My 32" 12 gauge VR Shadow Line Cheekpiece was built as a Live Pigeon gun, I believe but was a great double for Trap or Sporting Clays. Altough it did have a Hession rather than a Trap forend(Shorter).
Ws1 and Ws2 will still do well on Skeet.
But the majority of these guns are well used and who knows what mods were made.
You need a Pro Bore Gauge to measure constrictions to insure it's original or you should pay less.
Why not just order what you want from CSMC?-Dick

Last edited by Dick_dup1; 12/31/15 10:36 AM.