xxInfidelxx wrote:I only have the 5rd that came with the upper. so far I have 40 rds through it and never had an issue with feeding. Do need to pick up some sig mags or try to mod a Pmag to work. Anyone do a tutorial on the Pmag mod yet?
There is a post w/ numerous pages on converting the Pmags around.. I have converted about 4 20 rd mags and it got easier after the first 2 or 3..
I used a bench grinder to remove the follower ridge. I did not rebuild it with JB Weld though - Although I may try that soon so it will hold that first round right in the middle.
To remove the ridge on the front of the mag i first tried a dremal type tool from each end but that only got in about 1" or less... I ended up buying a small, narrow file that was much easier to knock down that ridge.. 10 minutes of filing and its pretty much knocked down..
Some ppl have just cut off the red tip off the hornady ammo and I think they fit in the mag without removing the front ridge then.
At first I did not use the nylon screw on the front of the follower - but without it the follower will tilt and jam.. Right off I cant remember if i used 1 or 2 nylon screws on the follower..
One suggestion i have is to buy different color mags for your 450B than other calibers.. I ended up with tan/coyote..
brian
If you are on Facebook, check out the 450 Bushmaster "Thumper" group I created.. We are always looking for new members and don't forget to share any pictures you have...