Posted: 7/6/2005 7:10:26 AM EDT
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good morning. i am gonna display my ignorance here and ask what is probably an ignorant question. what is the difference between a 'model 70' and a 'model 80' 1911? an inquiring dumb ass wants to know...................... thank you. peace. billr |
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Depending on the era of the gun there could be quite a few differences but the main difference when a 1911 is referred to as either a “series 70” or “series 80” is as such... A “series 70” design will not have a firing pin safety of any kind. A “series 80” will have some type of active firing pin safety that may be disengage via a number of designs. The most common being Colt’s “series 80” firing pin safety system wherein, during the compression of the trigger, a small set of levers are contacted by the trigger stirrup and “lift” a spring loaded plunger (that is located inside of the slide) out of the way of the firing pin. Until that plunger is lifted (during the trigger compression) the firing pin is essentially locked in place and cannot travel forward and potentially strike the primer of a chambered round causing the gun to discharge. Theoretically it is a “safer” design than the “series 70” guns as those lack any type of firing pin safety system. Personally, I like my guns with out the added “safety” but, when done correctly, the “series 80” parts as found in Colts will have no adverse effect on the trigger pull. |
| Yes, the series 70 refers to non firing pin safety models and I believe the term was unique to Colt 1911's. The series 80 utilize a plunger FP safety in the slide which is activated by a link which is activated by the trigger. This can and does affect trigger pull, however the Schwartz system utilized in Series II Kimbers and other 1911's is a plunger FP safety activated by the grip safety and therefore has no effect on trigger pull. |
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thanks for the replies. i am learning. i carried a 1911 when i was in the service [long time ago] but haven't owned or fired one for years. i got to lusting for one a while back and am having to do some relearning. i have on order the parts for this pistol [80% frame, slide, parts, etc.] and will be glad when i get them so i can go to work. my youngest boy [15] is coming to live with me friday. he is a budding machinist and is going to help me build it. i am sure it will be a good project for us. we have built muzzle loaders, ar's, a motorcycle, and all sorts of lesser stuff, including a die filer. the kid likes it. me too. we have the parts here to build him a 16" ar. he was pretty excited when i told him about that. we have also kicked around the idea of milling a lower from 'billet'. i think that would be an interesting project too. it is nice to have a shooting range out the back door and a machine shop out the front door. i have been stocking up on 5.56 ammo all year for when he is here. we had thought that he would be going back to indiana at the end of the summer, but he will be staying here. we have been trying to make this happen for about 10 years. we need some more bullets. always. can anyone reccomend any good reading and/or web sites that deal with 1911's? i believe that the kid needs to learn history, etc. as much as he needs to learn shooting. he has always been a good shot. what i mean is that he should know more than just how to pull the trigger and load the magazines. there is a lot to this that a lot of people don't bother to learn. thanks again for the explanations. peace. billr |
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thank you, SGB. as they say, a picture is worth a thousand......................................you are making it easy. as i have gotten older, it seems like it is harder for me to comprehend explanations sometimes. maybe i have alzheimer's disease. maybe i am just old. thanks again for the picture. it slipped in there while i was posting. peace. billr |
1911forum.com/ Enjoy |
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These two web sights have helped me learn how to repair my clone and to "fit" parts. Both sights have some history and descriptions of the differences between models. www.m1911.org/m1911dt.htm www.sightm1911.com/1911.htm |
Yea I do remember those collet bushing similar to the Detonics right ? It was still a push rotate thing only it had slots for "better accuracy" ? |
The idea behind the collet bushing was that said "fingers" would grip the barrel tighter than a standard bushing. And technicly....it worked. However, fieldstripping was a pain (unless you knew the "secret" of slightly retracting the slide before trying to turn the bushing....to allow the bushing "fingers" to clear the slightly bulged muzzle end of the barrel). Also....it wasn't uncommon for bushing "fingers" to break. A tight fitting "match" bushing is a far better choice for accurising a 1911 (though not quite as "mass-produced" friendly) |