An original Colt MK IV Series 70


Next week I begin another travel series — 54 days at sea on a trip that took us on two transatlantic crossings and a tour of both the Mediterranean and Black Seas. But for this week I’m returning to the subject that garners my highest audience, firearms.

An original Colt MK IV Series 70

It’s not often you come across a 36-year-old firearm in this condition. And according to the previous owner, the original Colt MK IV Series 70 has less than 100 rounds through it.

Colt MK IV Series 70 circa 1982

There are a few flaws in the original Colt satin blue finish, but I’d rate this pistol at around 98%. The wood grips also had some minor dings, as well, but also very minor.

Colt MK IV Series 70 original grip with Colt medallion

If you read my previous blog article on the new MK IV Series 70 (see: A Look at the Colt MK IV Series 70), then you know that the originals differed from the original in more than just the trigger. The original run from 1970 to 1983 also included a fingered “collet” bushing over a barrel with a widened muzzle end. This change was incorporated to improve the barrel-to-bushing fit in order to improve accuracy.

Series 70 collet bushing and wide-end barrel

The collet bushing held over into the Series 80 line until the late 1980s, but reports of bushing failures led Colt to revert back to the solid bushing which carries over to the reintroduced Series 70 pistols of today.

An original Colt MK IV Series 70 disassembled

The example here has a 70B prefixed serial number. That places this 1911 at the very end of the original MK IV Series 70 run, as the 70B serial number began in 1981 and ran through the end of production in 1983. The rest of the serial number leads me to believe that the actual year of production was probably 1982.

Colt 70B serial number places manufacture between 1981 and 1983

In my second article on the current Series 70 (see: Colt’s Series 70 Trigger Put to the Test — Series 70 vs. Series 80) I noted that the trigger was not all it was cracked up to be my Colt 1911 enthusiasts. I’ve since repeated my experiment (see video below) on side-by-side comparisons between probably half a dozen new Series 70 Colts and the current line of Series 80. Results were always the same. Out of the box, the current Colt Series 80 routinely beats the current Series 70 on every gun I’ve tried.

So, what about the original MK IV Series 70? Not so in this case. This truly the trigger I’ve seen praised. That’s not to say that the current Series 70 trigger is bad, as no Colt 1911/1991A1 trigger can be described as such from my experience, it’s just that the new Series 70 has more creep after take up and displays a degree of grittiness that simply doesn’t exist in any other Series 80 Colt I’ve tried.

Colt MK IV Series 70 slide stamp

COLT’S GOVERNMENT MODEL slide stamp

Sights on the original Series 70 match the current crop. They’re nothing about which to write home. I much prefer the three-dot sights Colt uses on the current Series 80.

Colt MK IV Series 70 rear sight

Colt MK IV Series 70 front sight

Here’s a comparison between a new Series 70 and a Series 80 M1991A1 to illistrate what I mean:

New MK IV Series 70 left; new M1991A1 Series 80 right

Fortunately, both the original and previous owners of this pistol did something that far too few people do; they retained the original box and owner’s manual.

Colt MK IV Series 70 box and owner’s manual ©1981

Here is this original Mk IV Series 70 posing with the box it came in:

Colt MK IV Series 70 with original box

But the box has definitely seen better days, and the Styrofoam insert inside was partially melted away from gun lubricant. Fortunately, that didn’t mar the finish on the pistol.

Colt MK IV Series 70 box

Advertisements

Comments Off on An original Colt MK IV Series 70

Filed under Firearms, R. Doug Wicker

Comments are closed.