Go, No Go Gauge

marriedwchildren256

So my SL308 lower is printed as mentioned elsewhere. Great! Or is it? Without getting into assembly just i just wanted to test fit a mag. Well it fits, technically. But its tight. Tight tight. I remember my orca being tight. But a little filing worked well enough on that. I'm not sure sure this is going to be the case for the SL308.

Note: Using PMAGs.

Q1: Since its so tight that implies the dimensions may be too far out of spec. So whats too tight?

Q2: I doubt tinkercad will let me pull this in based on size or detail limits. I'd like to just print the magwell. Do you have a good go, no go gauge?

https://media.discordapp.net/attachments/403267415313612810/1366565684594610216/PXL_20250428_234403120.jpg?ex=6812ba78&is=681168f8&hm=4bee59da7a76da7aa7b4b7b965b349240ae246a7c182694f075e5acef31068ee&

JohnSmith

Is your printer very precisely calibrated? I had problems with magwell tolerences until I recalibrated my printer.

marriedwchildren256

JohnSmith I thought so. I went through and recalibrated before this job but apparently i did a poor job of it. Or forgot how to maths.

Ill start from scratch and have a second go with the calibration and print since its way to tight.

I'd still like a go no go. Ill try the support blocker route in cura before installing fusion360/blender or whatever is free and quick.

hoffmantactical

Tight LR-308 mag wells are pretty common, and I'm not 100% sure why. The STL files are in spec. Can you measure the length and width of the mag well between pads? Should be 2.952" long by 1.085" wide.

marriedwchildren256

hoffmantactical 2.941" x 1.095". Doing recalibration now.