ALIENS: USCM M40 Grenades - screen accurate machined aluminum

AaronHorrocks

Well-Known Member
RPF PREMIUM MEMBER
I have a slew of resin grenades from Spat, and I have 1 aluminum grenade from SD Studios.
The resin ones cost me about $7 each, plus a lot of labor and the aluminum one from SD Studios was $25 plus shipping.
The SD Studios one is neat since the plunger moves and is spring loaded.
What I would really like, is a screen-accurate grenade, made out of aluminum so that it looks great up close - but also with the price as low as possible, so that I can fill bandoleers, armor, harnesses, or boxes, at a reasonable price. For instance, the Grenade Box fits 25 rounds. If a box was filled with 25 rounds from SD Studios, that'd be $750 plus shipping. Which is a bit much. Similarly filling a "Ripley Grenade Harness" with 16 rounds will cost over $400.

Furthermore, both of these grenades are a bit of an artistic interpretation, as far as I can tell, since they vary from the references that I have.
All of the original prop grenades used in the movie were hand made on a lathe, some out of wood. So there will be some variation between them.

I reverse engineered a grenade in AutoCAD, from a Screen-Used prop, for the most screen-accurate grenades as possible.
The goal here is to have the most accurate prop possible, while keeping unit cost as low as possible - So there will be no moving parts on these. They will be a solid piece of aluminum. I'm also going to press a spent primer in the base, rather than have a custom piece of brass machined.
I'm working with a new machineshop, I talked with them today, and they can fit these in before the end of the year.
We're aiming for a unit price of $10 each. Shipping may be extra.

I want at least 50 for myself, and I've already sold 40 on Instagram... So we might be aiming to have 250 or more made.

Send me a message for the quantity that you want, and for payment info.
 

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Oh, I should have been more clear. I am taking pre-orders, and at $10 each.
Shipping may be extra, and I'll have to follow up with shipping costs once they're finished.
Paypal is aaronhorrocks@hotmail.com
I also have Venmo, but I'm totally new to that.

Today, I ordered enough material to have 250 made.

If project costs go over, I'm going to eat it, because I'm keeping 50 grenades for myself. I'm going to fill my two Grenade Boxes in my Pelican Case.
 

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Aluminum stock has arrived!
We'll be making 250 dummy grenades
Expected to be ready January
Pre-Order is $10 each! (about 150 available)
 

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“I'm also going to press a spent primer in the base”
The first few times I read that, I think I misunderstood; now I’m slightly surprised. Are you saying you will insert (press fit) an actual used shotgun primer into a recess in the aluminum part? You have 250 of them, salvaged from a shooting range or something?
 
“I'm also going to press a spent primer in the base”
The first few times I read that, I think I misunderstood; now I’m slightly surprised. Are you saying you will insert (press fit) an actual used shotgun primer into a recess in the aluminum part? You have 250 of them, salvaged from a shooting range or something?

I have thousands of spent shotgun primers. I sorted them, by hand, into different colors.

Back when I bought a bunch of Spat's resin M40 grenades, I added spent primers into them to increase the realism of the prop grenades. And I made an instructional video:

 
Ok, that’s rad! Sign me up for one, please.

By the way, I really like the format of that video, with physically side-by-side examples of each step in the process. I feel like I’ve seen something like that before, but not often. It’s cool.
 
SET BACK!

We discovered that the aluminum ordered is "over-sized". The machinist had to order a new collet for the CNC Lathe, directly from Hardinge. This will add about a week of a delay.

Expected ship date on inert dummy aluminum machined M40 grenades is now early Feb 2023.

PRE-ORDER $10 EACH until the end of January. After that, there will be a price increase.
 

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Meanwhile, I finally finished my DIY wood lathe, and it looks like my plan to make myself some M40s in wood is going to work out pretty well. (Shown is a preview, a freehand proof of concept, not a serious attempt at accuracy yet.)

Can we cut a side deal for an extra handful of your spent primers? And maybe some extra red caps?

(I still want one of your aluminum M40s. Maybe even two or three, I can’t quite decide, but definitely at least one.)

C6C10B30-7951-4416-AC18-553074F3436F.jpeg
 

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