Stripped Lower Problem (SWAT Firearms)

true, but would fix the problem.

drewhall said:

On my billet 80% I was able to just use a small Allen key and tap it out. Not sure how tight yours is.

Click to expand...

That is what I have, the 80% blllet from SOMD. Allen key and I unscrewed it. I was just baffled for a minute until I got ahold of the guy and found out it was an allen screw. My eyes aren't what they used to be.

All,


Zombie revival. I got bored so I built up a preban receiver I picked up. Unfortunately, it is a SWAT receiver (only type I could find at the time). LPK went in, and everything fit for the most part. Aluminum, Thermold, Stainless, and Magpul Gen2 mags work fine and bhod (bolt hold open device) works. Magpul Gen3, no luck. The ledge at the back of the mag bumps into the formed trigger guard. After reading some reviews, I decided to try to manually relieve the area in question and see if I could make the magazine work. The tools I used were painter's tape (I used the blue stuff, but duct tape would also work), a small round diamond grit needle file (harbor freight), and a Magpul Gen3 magazine.


I inserted the magazine, and taped the trigger guard across where the magazine ledge touched it. I then taped down the sides of the receiver following the angle of the magazine well and following on to the trigger guard. Then tape across the magazine well where the the outside edge ends leaving a small gap between trigger guard and magazine well. The gap should be the back ridge/slot of the magazine well. You should only have a small triangular area on the trigger guard open/un-taped.


Once taped off, slowly start filing the untaped area. You will NOT need to file the whole untaped area, just enough to allow the magazine to seat and lock in reliably. You will need to make sure the filing is relatively even on both sides and slanted towards the magwell (the round file does most of the this). After approximately 30 minutes of gentle firm pressure filing, it should be able seat the magazine. I cut the magazine well tape down the center to open outward to adjust the fitting of the magazine. I filed until I could insert it without forcing it to lockup (like any other magazine insertion). Here is what it ended up looking like:











This is to show that it can be done without a milling machine (although it would have been quicker). I assume no responsibility or liability if you mess up your lower receiver. I used my own preban receiver knowing the risk if I screwed it up. If you are not capable, do not attempt this.




Q