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Posted: 9/15/2016 1:37:00 PM EDT
I just completed my first and maybe only ramp job on a Colt 9MM F/A Bolt. It had no ramping prior. It is a short length ramp, with a slight curve. I will be testing it this weekend in my Colt SMG. Comments, thoughts? I kept the ramp shorter in order to minimize the reduction in weight, with material removed. I did not want the rate of fire to go too high.
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Keep in mind that a 9mm bolt does not move nearly as far as a standard bolt carrier, so the angle of the ramp needs to be much steeper.
Other than the curve that looks like a similar depth of cut as how the more recent factory Colts are done. The lip at the front of your cut might be an issue. |
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Does anyone have a pic of a current Colt design ramped bolt?
Quoted:
Keep in mind that a 9mm bolt does not move nearly as far as a standard bolt carrier, so the angle of the ramp needs to be much steeper. Other than the curve that looks like a similar depth of cut as how the more recent factory Colts are done. The lip at the front of your cut might be an issue. |
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Quoted:
Does anyone have a pic of a current Colt design ramped bolt? Quoted:
Does anyone have a pic of a current Colt design ramped bolt? Quoted:
Keep in mind that a 9mm bolt does not move nearly as far as a standard bolt carrier, so the angle of the ramp needs to be much steeper. Other than the curve that looks like a similar depth of cut as how the more recent factory Colts are done. The lip at the front of your cut might be an issue. Here's a thread link to a 9mm DIY ramp cut with picture over on m4carbine.net . 9mm DIY ramp |
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Ramp topic from way back
If you desire to run 9mm,,, AR or M16,,, look inside at trigger for marks where tail of hammer may be hitting... I suspect the hammer is being wedged and ending up with oval hammer pin holes.. Take and remove tail off hammer a fair amount with AR-15,, but with M16, you can only take a small amount off before you get into backside of auto sear shelf (lug).. 
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| I just came back from a weekend of testing my own ramped bolt from my first post here. I test fired through my Colt DOE configured SMG. It worked fantastic! The rate of fire is slightly higher than my other bolt as a reference (I think 750 to 780 rpm), and it feels much smoother with less bolt jarring / recoil. I detected no unusual wear pattern on the Hammer/Fire Control Group. I think raising the contact point of the bolt to hammer has really improved the bolt cycling, and the modest length ramp is just right. |
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