Well if the only difference is the suppressor barrel then yeah the price sounds about right. Extra threaded barrels run between $100 and $200.00 depending on the gun and who you get it from. So if you think you might want to add a suppressor then $100.00 isn't bad. Note too that there are some cool muzzle brakes that fit on threaded barrels .... if you don't want to go to the cost and paper work of getting a suppressor the barrel is still useful. Plus the extra barrel length will add a little velocity to most rounds … maybe just a little bit. but it is there.

Benjamin, both actually have threaded barrels. The 10199 has extended threads which add 1/2" to overall length of pistol to 7.25". The 108390 has internal shorter threads for an overall length of 6.7". Buds prices are tied to stock level which could also play a factor in the price difference. You can see the internal threads on the 108390 here that do not extend beyond the slide : youtube.com/watch?time_continue=186&v=1NWSKOVn3Bc