St4ndard Length of Pull Buffer tube adaptor
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A tab inserted into your AR buffer tube that ensures a consistent length of pull
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution — Noncommercial
I saw HSP's D3fault and wondered if it was worth the money. I settled on “no, it's not," and designed my own. You insert the St4ndard circular side facing the back of the rifle and flat side pointed towards the position you want your stock to move to when you telescope it out. It will not fit tightly in the rail because it doesn't need to fit snuggly. Your stock will hold it in place. After you insert the St4ndard, you put on your stock as normal, also sliding the stock over the St4ndard, and when you deploy your stock, it'll stop at the position you want it to. There'll be about a millimeter of over pull, but that won't matter because it'll snap into place once you shoulder the stock.
I printed mine out of PETG at 0.3mm thickness and I haven't had any issues with it despite aggressive deployment of the stock. I recommend enabling auto cooling, because the cylindrical portion prints quickly and will deform if the fan is not on.