I'd also call them to confirm the fit/compatibility with your particular Para Ordnance pistol.

DP Para Ordnance 1911 Black Serrated Front Sight .185T x .080W,
with DP or Factory Adjustable Rear #021145 DP Front Sight
Price: $25.00

Even if the Colt hammer is factory-original, the Harrison hammer appears to be a superior product.

If I got the Harrison hammer, though, I'd probably also get the sear...In which case, I'd also get the disconnector, or the entire 'ignition kit'.

Man, this stuff adds up fast...

EGW Front Sight Blank - Para [15030]
"The Para Blank is machined to match Para’s front sight cut."
Price: $34.99

Harrison did some of the work on my Springfield GI so I am familiar with his stuff. He not only performed his round butt surgery to the frame, he provided his version of the Yost-Bonitz rear sight, which will likely go on my Para as well. It currently has a very nice rear sight, reminiscent of the rear sights that Colt uses, sort of a taller version of the original GI sights. However Para has seen fit to include dots, which my poor old eyes have trouble with at times, so until I fit a better sight, I suppose a black sharpie marker will have to suffice.

Otony

FOG, do your magic and see if you can locate a front sight that fits the Para's front dovetail, please? One that is NOT fiber optic!

I have used several Berryhill 1911 parts − including an 'ignition kit' with a traditional commander-style hammer − and they have all been first rate.

Based on that experience and Mr. Harrison's reputation, I would expect good things to come from him as well.

HD-133 Original Commander hammer @ Harrison Design

Colt Commander Series 70 Hammer − "New Old Stock" @ GunBroker

Turns out a Series 80 hammer has a shelf, rather than a half-cock notch. So the 80 hammer can drop if it is resting on the shelf and the trigger is pulled.

Having discovered that, I also discovered that an 80 Series does not need that peculiar hammer for the firing pin safety system to work, it will function just as well with a 70 style hammer with the half-cock notch, and also that you can fit a 70 hammer to the existing sear. In truth, having discovered this factoid, I think I would prefer the earlier hammer!

So! Anyone got a Colt Commander hammer, preferably a Series 70? Oh, and thank you FOG for making me do my due diligence!

Otony

Otherwise, I'll wait until Rob answers before looking for one.

For those that may have been wondering, I am slowly (very slowly) changing out parts on my Para USA Expert Commander to "original" Colt Commander style parts.

I intend to install a solid trigger (long version however), to go along with the 1960s style grip safety and hammer. Will likely keep the plastic mainspring housing as I have NEVER seen or heard of one failing, the checking is amazingly sharp, and it is far lighter than a steel housing. The grip safety (which we had to modify to work in an 80 Series) is also lighter than the beavertail that came on the Para. Part of this is for the retro look, albeit not full-blown, and the rest is to lighten if only slightly the overall weight of the gonne.

I have a very lovely set of jade green G-10 grips, in a pale shade. Totally smooth, and quite interesting looking. If these look good on the Para the set will remain, as I have never minded smooth grips on a 1911. If the appearance is awful, I will probably have to do some classic double diamond grips in a thin version.

I'm one of those lucky fellows who has never, ever been bitten by a 1911. I also rather prefer my guns to be styled after those of the heroes of my "yute". Thus the abbreviated grip safety and "antique" hammer. I'm going to pick up a Caspian ambi-safety and cut the pads down on either side to appear similar to a WWI thumb safety.

Some of you might recall how I reworked my Springfield Armory G.I.to a more classic appearance. It was a nod in the general direction rather than an unrealistic attempt to fool one into believing they had a WWII 1911A1 in their hands. This is the same sort of idea, a homage if you will, to the Commanders Uncle Jeff used to feature in his G&A articles of the 1960s and early '70s.

Fun stuff Maynard!

Otony