I know this has been discussed but I can't find it in search. Will the M4/SPR fit or does it hit the piston end?
I know this has been discussed but I can't find it in search. Will the M4/SPR fit or does it hit the piston end?
I emailed LMT perhaps 6 months ago and they replied that an M4/SPR would not fit.
The SPR/M4 requires about 2.5" of unobstructed barrel behind the muzzle to properly fit. The 12" LMT piston barrels are just over 1.25" to the gas block. An M4-2000 or an M4-1000 will fit, but will prevent the piston from being removed without removing the flash hider or pulling the barrel.
Chris
Walker Precision
FFL/SOT
Chris,
Thank you for the info and photos.
Alan
No problem. Hope the info is helpful.
Chris
Walker Precision
FFL/SOT
This information is incorrect. I own a 12" LMT CQB piston rifle in 5.56mm and the M4-1000 AAC can. I think I was the first person to figure out that you can seperate the piston and push rod from each other while it is inside the upper. What I do:
1) Remove the can.
2) Pull the upper from the lower.
3)On a bench flip the upper upside down so the op-rod is visible, grab the op-rod with a smooth jawed pair if needle nose pliers, gently pull the op-rod from the piston. The two parts will now be loose/seperated. Keep rearward pressure on the op-rod while manipulating the gas plug out from the front of the piston housing.
4) Then just let the op-rod run forward under it's own spring pressure. Done deal.
This process is even easier if you want to go to the trouble of pulling the Q/C barrel.
When I discovered this I reported this procedure to AAC's Mike Meyer as well as Gene Swanson over at LMT. Both were grateful for the tip.
Hope this helps,
openbolt
Thanks for the info.
Chris
Walker Precision
FFL/SOT
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