Any recommendations on who could replicate a Remington MSR/PSR/CSR Barrel Extension from donor extension?
Barrel Extension Replication
- Thread starter Milspec Longhorn
- Start date
I am certainly interested in this as well. If someone got their hands on a few original extensions, would there be a way to have them scanned and manufactured correctly? As in to make some new ones that are the correct tolerances?
I checked into it a bit. More complicated than it seems. Requires extension and the bolt and perhaps even the rifle to confirm fit then some time to model it
The only way to 100% match tolerances is to have the original prints from Remington. Otherwise the best you can do is measure a part or sample lot of parts and see where the dimensions lie and then make educated decisions about what tolerances to make new parts to. Having mating parts will also tell you a lot in order to make educated decisions on what tolerance range will make a functional part.
There’s really one of a couple options here.
1. Bring a part to a machine shop and ask them to replicate it. They will match tolerances as close as possible to the original. In this case you’re either letting the machinist make judgement calls on what’s “close enough” or you’re giving him a max deviation tolerance. If you let the machinist decide you’re more likely to get a non functional part and then have to pay for multiple iterations to get it right. If you go with a max dimensional deviation, the tighter the tolerance you require it to be to the original the more expensive it gets.
2. Reverse engineer it making new models and prints and specify tolerances with what information you have. This is more expensive up front but allows for reproduction, and if it’s ever done in mass production will give you the lowest price per part. Having a model and print allows a machine shop to produce even a small batch more efficiently. This is also your best bet to have a functional part.
There’s really one of a couple options here.
1. Bring a part to a machine shop and ask them to replicate it. They will match tolerances as close as possible to the original. In this case you’re either letting the machinist make judgement calls on what’s “close enough” or you’re giving him a max deviation tolerance. If you let the machinist decide you’re more likely to get a non functional part and then have to pay for multiple iterations to get it right. If you go with a max dimensional deviation, the tighter the tolerance you require it to be to the original the more expensive it gets.
2. Reverse engineer it making new models and prints and specify tolerances with what information you have. This is more expensive up front but allows for reproduction, and if it’s ever done in mass production will give you the lowest price per part. Having a model and print allows a machine shop to produce even a small batch more efficiently. This is also your best bet to have a functional part.
I certainly understand that. I keep hearing people are looking for these parts. Not just here but in other forums. So if the plans for the parts are not obtainable, and whatever current form of Remington doesn’t see the benefit of servicing and providing these parts to the owners of such rifles, it seems to me that somewhere in this community there has to be smart enough people who, if provided access to full rifle systems, bolt faces, extensions, etcetera, that someone in the field of manufacturing could scan, measure, and replicate these parts. I grew up working in a professional aviation machine shop, and even “way back then” there was the institutional knowledge to take a known part and reverse engineer it.
So as you say in number 2, I feel this is a good solution. If the community of owners of these systems could partner with a facility to accomplish this, it seems that there would be a significant market. Not a huge one, but for those who spent as much money as these systems cost, I feel that they would pay to have further capability to maintain the system or augment it, and that the more extensions made, the less per unit cost.
Would certainly be nice to have some spares and some to mount onto new calibers or such.
After a conversation with Milspec Longhorn the other day I’m trying to find out if this is possible to commercially reproduce. From past experience with intellectual property, I’m going to assume RemArms(Remington) will probably say no or the cost will be astronomical.
Yes. Not just extensions. The bolt heads as well. Not sure if they use normal Rem firing pins but that is another part needed
