Spike’s Complete M16 BCG
Spike’s ST-T2 Buffer
Done!
Hi Rob - done. I had them large to make it easy to read the scale… and I’m working off of a 24".
Excellent work as always Rob. I’ve been looking for something like this for awhile. Thanks…
Here are a few more I just received.
MAGPUL RVG
MAGPUL MOE Stock (no butt plate)
MAGPUL Butt Plate (Thin)
MAGPUL MOE Rail (2" w/hardware)
I have to say this is an aspect I have thought of, but not to this extent. I will have to keep this for future reference. Thanks for putting this together.
Very nice info info to have when weight is an important consideration for a build.
Thanks.
Can anybody with a scale tell me the weight of the Colt factory 4 postion buttstock? I’ve been calling it a T6 but I don’t think that’s right. The lightest thing on the chart was the CTR at 7.4 and just from holding the two I think the Colt feels lighter, just curious wether or not it actually is.
Edit: Is the CTR 7.4 without a buttpad?
Yes the CTR is 7.4 oz. without the buttpad. The included butpad is 1.3 oz.
Yes the CTR is 7.4 without the buttpad, or yes the Colt factory 4 position is lighter than the CTR?
Daniel Defense Aimpoint Micro Mount: 1 3/4 oz
Brilliant! This is great info. I’m already seeing a few things that may sway me to a different product for future builds.
Les Baer with no Forward Assist
Rock River Arms (I think, I’m actually not positive as I’ve had this floating around for quite some time, but it should be typical of a flattop M4 upper)
Knight’s Armament with “integral” rear BUIS
1 5/8 oz or 46 g.
Thank you.
Keep in mind using different brands and models of scales—especially the relatively low-end sub $50 kitchen and hobby scales shown in this thread—will produce vastly different results.
I threw several of these parts on a calibrated (laboratory) $1k Ohaus scale and came up with different numbers. (Even my personal OHaus Scout is giving me different numbers, closer to the lab scale.)
The cheap scales are great when you can measure one item against another yourself (to see a change), but for creating a baseline weight or for referencing against someone else’s measured weight isn’t a good idea for a chart like this.
Even the Excel chart is off a little bit on several of the items I checked. Some more than others. (The LaRue BUIS it shows as 3 oz., the two I measured were exactly 2.9 oz. Some barrels were off by an ounce and more. Small differences, sure, but they will add up quickly when you measure 5, 10 or 20 parts.)
So… the solution is to send inventory of your safes to me and I will spend the next two weeks disassembling, weighing and making a master spreadsheet. I promise to return everything. 
I just bought a small scale for getting accurate results. Its acurate to .1 grams. I have some parts to weigh. Rob, do you prefer measurements to 1/100 of an ounce which would obviously be more convient or 1/10 of a gram which is a litte more defined at around 3.5/1000 ounce.
just a note, if you are looking at the weights of the stocks, the old entries are with the buffer assembly, but the new additions of the EMOD and CTR are not. so don’t think that the CTR is lighter than the CAR stock, or current M4 stock.
Very useful information. Thanks.
this was my personal AR weight saving journey.
https://spreadsheets.google.com/pub?key=0Arnvwbhgl9SCdEpXRjh1UjlmbENZVnBFQ01senFHeHc&hl=en&gid=0
and this was my result.
