HD-205 Extreme Service firing pin stop

Extreme Service firing pin stop for .45 Gov't Model, S-70

9 review(s)

Highly recommended for both heavy recoiling 1911s and also 1911s with shorter than Gov't Model slides. The Extreme Service firing pin stop is CNC machined out of an oil-quenching tool steel that was chosen for a balance of impact and wear resistance. GI hardness is 44-50 and we typically shoot for the middle of that range, 46-48 Rc. The Extreme Service FPS is made .482" wide so it can be fitted to your slide and extractor to prevent extractor "clocking". It has chamfered fitting pads on each side to make your job easier and the FPS fit better into the slide.

It has a 3/64" radius machined on the bottom rear corner and a 3 degree angle at the top rear face, both of which act to take away mechanical advantage from the slide when it's cocking the hammer, by moving the contact point to the bottom of the hammer face. This will retard the initial movement of the slide, slowing it's rearward speed a little. This will allow short length 1911s to have less imbalance between the slide's speed and the magazine spring's force on the last couple of rounds, reducing the bolt over base type of malfunctions caused by the slide outrunning the magazine spring. Users report that it also softens the felt recoil even on full size 1911s.

This firing pin stop is configured for .45 cal Series '70 Gov't Models in blued carbon steel and stainless steel. If your frame and ejector look like the picture above, this is the firing pin stop for your pistol.

The things that make a Harrison Design firing pin stop better -

1) H-D fps are made in all varieties and materials possible on a 1911 so you don’t have to make extra machine cuts to get a real Commander S-70 configuration, for example. Or a .45 Gov’t S-80 that matches up fully to the end of the disco rail for another.

2) The topmost radius is left at USGI dims instead of just running them out into the extra wide side flats. This results in less shaping of the top radius to get the fps to seat all the way up into the slot.

3) The sides are made as fitting pads and the back edge has a nice chamfer to make it easier to fit to the slot and the extractor.

4) The sides are made to the correct thickness so they will go into the extractor slot without extra filing.

5) The bottom hammer-cocking radius and a 3 degree top angle are already cut.

Now available in a shortened version to fit the Springfield Range Officer and other .45 Gov'tModels that need a short FPS to clear adjustable sight cuts. Order HD-205-LPA or the HD-205-LPA-S.

NOTE - The LPA firing pin stops can be used with other adjustable sight apps. The distance from the top of the firing pin port to the top of the FPS is .110" on the HD-205-LPA & HD-205-LPA-S. Compare that to your existing FPS dimensions to see how it will work for your situation.

HD-205 Extreme Service firing pin stop

For .45 Gov't Model, Series 70, Blued Carbon Steel

$26.95

Qty:

HD-205-S Extreme Service firing pin stop

For .45 cal Gov't S-70, stainless steel

$29.95

Qty:

HD-205-LPA Extreme Service firing pin stop

For Springfield Range Officer.45 Gov't Model, Series 70, Blued Carbon Steel

$29.95

Qty:

Existing reviews

Very nice and easy upgrade

I got the new tapered firing pin stop for my wife's 1911, it was so purdy coming out of the package I almost hated to fit it, which only took a couple of licks as it was .004 over-size for my gun, all other dimensions were spot on and perfectly polished (like mirror polished), took a blue like no other, and functions great! It does as advertised! I would totally recommend this!

From: redleg1013@yahoo.com | Date: 4/17/2013 7:30 PM

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Great Part

Just put one of these in my R1.  John left just the right amount of extra material so I could get that perfect fit.  Only took a minor bit of time on an oil stone and it slid right in.  Exact fit to my Wilson Extractor as well with no extra fitting.

The only really extra work was that I had to notch out the corner for my 80 series (Yup I know this part is for a 70 series just didn't want to wait...)  Really easy to cut out the corner with my Dremel.

Just took it to the range and I have to say I like the change in the recoil.  I did notice a reduction in the felt recoil, especially with some light loads I had with me.  The light 45 loads actually felt similar to a Hi Power I shot recently so this part definitely works well with lighter loads.

Never realized how such a minor change in a part can totally alter how the gun runs.  Great part!

From: tonykonovaloff@hotmail.com | Date: 4/20/2013 5:19 PM

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Awesome Firing pin stop

Awesome firing pin stop!
Much less fitting than the previous oversized firing pin stops that I have installed.
They dropped right in to two different guns. I had to file a bit for ejector clearance on my Springfield Champion Operator (a 4" 1911 with an ejector that's more to the center of the cartridge, I suspect your HD-206 FPS for commander sized guns would have dropped right in, but I didn't want to wait) But other than that, thickness, overall width, extractor engagement were great.
Same story with my Kimber Super Match. Great width, length and extractor engagement. The Super Match has adjustable sights, so I had to work on the top of the FPS for the bomar-style sights, but other than that it was a drop in fit! Awesome. I was able to get both stops in my guns in less time that the other oversized stops take to get into just one gun.

From: chrismartin@mac.com | Date: 5/4/2013 8:19 PM

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Quality Part

Ordered this on a Sunday night. Arrived the following Wednesday. Fit and finish is outstanding. Pressed right into my Kimber slide. No hand fitting required. Nice and tight. No more clocking of the Extractor. It also appears to have pulled the stock extractor back a hair which produces slightly firmer tension on a test cartridge rim. I have not test fired it yet, but I can already tell from function testing that I will be pleased. Excited to see if there is a noticeable difference in recoil. Highly recommend.

From: gerritjh@aol.com | Date: 4/2/2014 9:33 PM

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Superb quality

A bit over sized for SW 1911 on the sides.

From: mail2mdeng@gmail.com | Date: 5/19/2015 10:29 PM

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Just Awesome

One of my earliest experiences with my RO was the original FPS falling out because the firing pin stuck out the breach face and simply wasn't there to hold it. Well I was so glad to see you were offering a FPS for the RO spec, I couldn't wait. Got it in and installed it and I am really impressed. The fit was great I couldn't be happier with it. Thank you so very much for continuing to offer these great parts, your workmanship is outstanding.

From: rjp1965@hotmail.com | Date: 8/4/2015 6:19 PM

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reduced radius firing pin stop

Excellent service, awesome machine work, and almost no fitting required. I recommend one to everyone that shoots a 1911. The closer you get to JMB's original design, the more reliable your gun will be. Install this part, learn to tune your extractor, and buy some good mags, you'll love your gun in no time.

From: crossfirelu5@yahoo.com | Date: 4/22/2016 3:48 PM

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reduced radius firing pin stop

From: crossfirelu5@yahoo.com | Date: 4/22/2016 3:51 PM

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Great FPS!

Generally, I hate fitting firing pin stops, but this was quite simple and easy to get a good snug fit. Will only be using these from where on out.

From: Tfwftw@gmail.com | Date: 1/16/2021 6:41 PM

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