Mumbles Marble Mouth
CGN Ultra frequent flyer
- Location
- Lower Mainland
Been hearing a bit of complaints about upper to lower fitment. Whats the upper to lower fitment like on these rifles? Is it M&P Sport II fit or worse?
All my FA uppers fit nice and snug. My one SS upper has a slight bit of play but not enough that I would consider it an issue.
If you're talking about the roll pin for the FA I had to crush mine a little bit in the vice before hammering it in. Even then it mushroomed a little at the very end. I had my set cerakoted, so maybe that might have something to do with it?What have y'all done with your Forward Assists? I see some posts replicating a problem i'm having with a milspec FA install. Roll pins seems too big or there's something else going on with fitment. Genuinely a PITA.
What have y'all done with your Forward Assists? I see some posts replicating a problem i'm having with a milspec FA install. Roll pins seems too big or there's something else going on with fitment. Genuinely a PITA.
What have y'all done with your Forward Assists? I see some posts replicating a problem i'm having with a milspec FA install. Roll pins seems too big or there's something else going on with fitment. Genuinely a PITA.
As noted, I would use a drill bit of the correct size to see if it fits without the FA inserted. I'd also suggest that you insert the FA without the pin and look through the pin hole to see if it protrudes into the pin's hole.
On my friends rifle the pin hole was the correct size but the FA's we had protruded into its space so the pin couldn't go past.
What have y'all done with your Forward Assists? I see some posts replicating a problem i'm having with a milspec FA install. Roll pins seems too big or there's something else going on with fitment. Genuinely a PITA.
Has anyone else received a lower where the spacing between the two ears that hold the pin for the bolt catch is too wide? With my bolt catch installed it wiggles back and forth slightly. Rifles functions and fires fine but just a tolerance issue I believe.
The tolerance was kept wide to allow more fitment options... you can shim it to remove some of the play...
Fair enough, I'll have to find a tiny o-ring or washer to put in there
Personally I wouldn’t worry about it at all. It’s a rifle not a jet turbine. I see nothing to gain from shimming it there.
Actually here's what happened to one of mine.
Gen 3 Pmags are known to cause bolt catches to "slip", sometimes partially due to the bolt catch moving rearwards if you insert an empty mag(I know, why insert an empty mag?). Nonetheless what I did was I took a C clip off of a ejection port door pivot/strut, clamped it a little tighter so it'll fit perfectly on the roll pin of the mag catch. I think a washer works too but they don’t usually come in black. Problem of slippage disappeared after.
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