The modified version has a larger thread ID (barrel). .303 modified and .263 for the standard if memory serves. Bob Dzuricky's site has a great comparison of the 2 if you'd like to check it out. http://dzcues.com/modified_pin.html
The modified version has a larger thread ID (barrel). .303 modified and .263 for the standard if memory serves. Bob Dzuricky's site has a great comparison of the 2 if you'd like to check it out. http://dzcues.com/modified_pin.html