* Try at your own risk *
I decided to take the risk for all of you and went ahead with my file and sand paper.
1st mod is for making feeding more reliable. Especially for when the magazine is tilted down in the magwell, which would cause the round to ram into the flat part under the feed ramp and cause a jam.
How: Simply take a small round file and make your feed ram just like the M4 extension.
Try tilting front downwards your magazine with dummy rounds to see how far you need to go. I only needed to go about 1/16 to make it work, but I went 1/8 anyways to ensure there's room for error.
2nd mod is to make magazine fit or even drop free, especially Pmags.
How: Take a flat file or sand paper glued on a flat wood stick, start filing away metal at the part that is shiny shown in the picture.
This ridge is usually too tight and seems to be catching onto the rear ridge of Pmags. File it away slightly and Pmags will begin to fit perfectly. Go further and it'll start dropping free. Always visually check your fitments of pmags after every slight "go", we don't want an expensive paper weight. Also be careful of the file hitting the bolt catch, I used a file that fits between the bolt catch and the ridge wall.
I decided to take the risk for all of you and went ahead with my file and sand paper.
1st mod is for making feeding more reliable. Especially for when the magazine is tilted down in the magwell, which would cause the round to ram into the flat part under the feed ramp and cause a jam.
How: Simply take a small round file and make your feed ram just like the M4 extension.
Try tilting front downwards your magazine with dummy rounds to see how far you need to go. I only needed to go about 1/16 to make it work, but I went 1/8 anyways to ensure there's room for error.

2nd mod is to make magazine fit or even drop free, especially Pmags.
How: Take a flat file or sand paper glued on a flat wood stick, start filing away metal at the part that is shiny shown in the picture.
This ridge is usually too tight and seems to be catching onto the rear ridge of Pmags. File it away slightly and Pmags will begin to fit perfectly. Go further and it'll start dropping free. Always visually check your fitments of pmags after every slight "go", we don't want an expensive paper weight. Also be careful of the file hitting the bolt catch, I used a file that fits between the bolt catch and the ridge wall.

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