M40 A1 Bottom Metal

[YLeeFoxx]

Has anyone used th PTG bottom metal on a M40 A1 build? If so, what was your experience. This will be going on a new -production McMillan Smear.

Their website shows them in stock and the price is reasonable.

Thank you.

 

[pmclaine]

https://pre64win.com/collections/bottom-metal

 

[Deathrowdave]

They look top shelf . Many years ago I was at a gun show found my M70 guard and floor plate for $15.00 . I had no idea what I gift I found at the time .

 

[kft101]

Here’s a previous thread on PTG M40A1 bottom metal fit (and others! lol so scroll down to get to PTG): https://www.snipershide.com/shooting/threads/where-to-buy-m40a1-bottom-metal-for-build.7208046/

Read through the new smears thread and some folks have posted bottom metal info there too.

Regardless, you’ll want to use a post 64 trigger guard if buying an original Win 70 part. Pre 64 trigger guards are narrower and thicker in height for the current McMillan M40A1 bottom metal inlet.

 

[Coejro]

The bolts that PTG supplies aren’t long enough, according to a few folks that have purchased.

I’d say hunt for a steel trigger guard, they’re out there, and half the fun is the hunt.

If you do get the PTG version just be prepared to buy longer bolts.

 

[Fridgepants]

The bolts that PTG supplies aren’t long enough, according to a few folks that have purchased.

I’d say hunt for a steel trigger guard, they’re out there, and half the fun is the hunt.

If you do get the PTG version just be prepared to buy longer bolts.

M70 steel guards? Are the post 64 solid steel as well or a cast?

*I’m in the homework phase of a m40a1

 

[Fridgepants]

Got a newbie question for you guys. I’m sourcing the bottom metal for a post 64 build and I’m seeing one piece win m70 trigger guard and mag housing minus the floor plate. Then I’m seeing old stand alone trigger guards.

 

[Coejro]

@Fridgepants this has what you seek:

M40a1 build guide

Well a couple of you have asked for a build guide for our M40a1 take off stocks. I am building an accurate clone, and learning as I go. I am by no means an expert, but I'm trying to find the right information just like many of you. Please post if it directly pertains to a the topic at hand or...

www.snipershide.com

 

[cplnorton]

This is what an original set looks like that were taken off a 1977 M40A1 build. If you need any measurements let me know. But there is some slight variance in these.

I also think I might have a set of the PTG's too. They work great for the repo stock set, or at least the set I have does.

 

[Random Guy]

I’m sourcing the bottom metal for a post 64 build and I’m seeing one piece win m70 trigger guard and mag housing minus the floor plate. Then I’m seeing old stand alone trigger guards.

See Norman Chandler's book, Death from Afar, Vol 1 (1992), pages 124 & 127.

The starting point is the bottom set in this picture. Top is the final configuration.

This was made at PWS/Quantico several years ago, but the 2112 left the pre-64 M70 floor plate "long" since it was not yet fitted to a stock. When this modified Model 70 bottom metal is fitted to the stock, the length of the floor plate is often shortened and the rear corner/edges are beveled/rounded. Finally, after fitted to the stock, a small notch is hand-filed where the arrow is shown. M40A1 floor plates are a hand-fit item.

 

[Fridgepants]

This is what an original set looks like that were taken off a 1977 M40A1 build. If you need any measurements let me know. But there is some slight variance in these.

I also think I might have a set of the PTG's too. They work great for the repo stock set, or at least the set I have does.

Thank you. I’m still working understanding the original m70 bottom metal and the few other makers that do repros. Is this or the PTG extra or something that you might sell down the road?

I’m also stuck on this ADL/BDL mag box confusion on here. I get the gist that both will work but will need adjusting to fit. I’m under the impression once all these parts are gathered and sent to one of the reputable builders on here they’d be able work out all small details.

 

[cplnorton]

Thank you. I’m still working understanding the original m70 bottom metal and the few other makers that do repros. Is this or the PTG extra or something that you might sell down the road?

I’m also stuck on this ADL/BDL mag box confusion on here. I get the gist that both will work but will need adjusting to fit. I’m under the impression once all these parts are gathered and sent to one of the reputable builders on here they’d be able work out all small details.

I sent you a PM.

But on the ADL/BDL mag box confusion, I'm not sure what you are trying to figure out. But it's a pretty simple part to find.

The original Marine Corps docs list the magazine box for the M40A1 as Remington part number 16715, which if you look that up, that is just the standard short action BDL magazine box.

According to the docs, the only thing the Marines did to the magazine box is tig weld them to the bottom of the receiver in the front and and back. They did this on everyone I have torn apart now, early and late builds.

 

[cplnorton]

I have seen some really shady stuff come out of PTG. But I have to say their bottom metal is pretty good. At least the one I got off them.
This is a set of PTG's vs an original set from a Feb 1980 M40A1 Build. The PTG Floorplate is a little longer than the USMC one, but that is correct. The Marines only cut them down so much to begin with and then individually shortened/fit them to the build they were doing. They were custom fit that is why you see some variance in them when you get originals side by side.

 

[jaboss]

The ptg sets are good, but two things to note. One, the screws they are providing with them are not correct. Two, the floor plate is about 1/32" long and does not have the divet filed in for the detent on the trigger guard.
Those sets were made by scanning a Winchester model 70 bottom metal that I modified to the M40A1 build procedures. The final fit of the floor plate was intentional to be done after bedding, but they don't list that anywhere in the description that I have seen.

 

[Fridgepants]

The ptg sets are good, but two things to note. One, the screws they are providing with them are not correct. Two, the floor plate is about 1/32" long and does not have the divet filed in for the detent on the trigger guard.
Those sets were made by scanning a Winchester model 70 bottom metal that I modified to the M40A1 build procedures. The final fit of the floor plate was intentional to be done after bedding, but they don't list that anywhere in the description that I have seen.

I’ve heard the screws were wrong but didn’t know about the missing. They have not rectified this still that you know of? I was going to send these off to be coated in black oxide and thought this was going to save me time and money, but it sounds like I would have to send them to the gunsmith for adjustments, then send it to be coated then send all the finished parts back to the builder for assembly.

 

[jaboss]

I don't think they have any plans of changing them. When we sent the modified set to be scanned and made, I had no idea they were going to sell them to public at all, much less as a ready to go bottom metal set.
As far as your plans with the build, I would not send them to get modified, then blued, and then back to be built. That final touch is meant to be done during the final part of the build. I would wait until the build is finished, then get it blued and assembled.