ozziemo27 Posted January 25 Report Share Posted January 25 While looking at Numrich for some grease gun parts I came across a couple things I have questions about. Is this actually a grease gun variant's trigger? Is this m3a1 guide rod assembly unfinished? What retains the guide rod retaining plate on the rods themselves? Thanks! Link to comment Share on other sites More sharing options...
Got Uzi Posted January 25 Report Share Posted January 25 Yes there the trigger minus the trigger bar The guide rods are held in place by tension as you drive them into the rear plate Link to comment Share on other sites More sharing options...
Rekraps Posted January 25 Report Share Posted January 25 1 hour ago, Got Uzi said: Yes there the trigger minus the trigger bar The guide rods are held in place by tension as you drive them into the rear plate And that is a M3 rear guide rod plate, the M3A1 plates were bigger to prevent damage to the rear of the receiver. Also, the bolt, once installed on the guide rods with springs is retained with a small "C" shaped retainer clip. Link to comment Share on other sites More sharing options...
Rekraps Posted January 25 Report Share Posted January 25 10 hours ago, ozziemo27 said: While looking at Numrich for some grease gun parts I came across a couple things I have questions about. Is this actually a grease gun variant's trigger? Is this m3a1 guide rod assembly unfinished? What retains the guide rod retaining plate on the rods themselves? Thanks! GB currently has a set of the A1 rods and end plate for sale. You'd be much better off using that as it is an upgraded design. Will work fine in the M3 and M3A1. Link to comment Share on other sites More sharing options...
ozziemo27 Posted January 25 Author Report Share Posted January 25 7 hours ago, Got Uzi said: Yes there the trigger minus the trigger bar The guide rods are held in place by tension as you drive them into the rear plate I got them in the mail today, is it an early production m3 model trigger or something and that's why it is different? The guide rods are loose in the plate, so there is no retention or press fit. 5 hours ago, Rekraps said: And that is a M3 rear guide rod plate, the M3A1 plates were bigger to prevent damage to the rear of the receiver. Also, the bolt, once installed on the guide rods with springs is retained with a small "C" shaped retainer clip. I was under the understanding it was an m3a1 plate, which they made smaller to make disassembly easier (not having to remove the ejector housing or something? But it in turn is harder on the backs of the receivers. I could be wrong. 5 hours ago, Rekraps said: GB currently has a set of the A1 rods and end plate for sale. You'd be much better off using that as it is an upgraded design. Will work fine in the M3 and M3A1. I will be adding a steel puck to the back of this guide rod assembly for a semi auto build so this won't be an issue as well as making a custom front retainer. Link to comment Share on other sites More sharing options...
John in IN Posted January 25 Report Share Posted January 25 You are correct. M3 is the LARGER rear plate. M3A1 is the smaller plate for easy disassembly but causes damage to the receiver over time. John Link to comment Share on other sites More sharing options...
Rekraps Posted January 25 Report Share Posted January 25 1 hour ago, John in IN said: You are correct. M3 is the LARGER rear plate. M3A1 is the smaller plate for easy disassembly but causes damage to the receiver over time. John Me get dyslexia. Link to comment Share on other sites More sharing options...
damifino Posted January 26 Report Share Posted January 26 (edited) There is a groove cut around each rod near the end. The back plate is pressed into that grove to hold them, but also allow them to move and play nice with the bolt. Hard to describe, they stamp a ring around the hole and it pushes the metal into the groove. Edit to add pics. I'll try again later Edited January 26 by damifino Added pics Link to comment Share on other sites More sharing options...
Rekraps Posted January 26 Report Share Posted January 26 On 1/25/2024 at 1:20 PM, John in IN said: You are correct. M3 is the LARGER rear plate. M3A1 is the smaller plate for easy disassembly but causes damage to the receiver over time. John Goodness knows how I mixed that up (I own a M3) but the larger end plate is for the M3 and the M3A1 is the smaller plate. FM 43-21, page 22 confirms. I'm getting old guys. Link to comment Share on other sites More sharing options...
ozziemo27 Posted January 27 Author Report Share Posted January 27 Ahh, this makes perfect sense. It looks like numrich is selling them in "unassembled/unfinished form". Thankyou for taking the time to post that. It makes sense now what those grooves are for. Here are a couple more pictures of the trigger if it happens to ring a bell with anyone. On 1/25/2024 at 7:12 PM, damifino said: There is a groove cut around each rod near the end. The back plate is pressed into that grove to hold them, but also allow them to move and play nice with the bolt. Hard to describe, they stamp a ring around the hole and it pushes the metal into the groove. Edit to add pics. I'll try again later Link to comment Share on other sites More sharing options...
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