I own an LMT CQB.
It came with the standard 16 inch or so carbine barrel.
I came across a sweet 20 inch stainless steel barrel in the PX and bought it. I have probably fired 1000 rounds through it. Shoots great.
Any way, last night while cleaning the rifle I note a ghost imprint of the back of the gas key on the top of my lower receiver at the buffer tube.
May have been there since I fired my first round on the rifle.
I don’t like it.
Last thing I want to do is beat my lower or shear off the gas key.
Gas block on the twenty inch barrel is slightly forward of the 16 inch barrel gas block by maybe an inch, just enough to have it sit past the end of the quad rail. The sixteen incher is in the quad rail IIRC.
I’m thinking the extra gas going through the tube before the bullet exits the barrel is causing this.
Liking the twenty inch barrel but not liking the impact on the lower receiver.
Perhaps a heavier buffer or spring but What might do is cut the twenty to 18 inches which is what I really wanted for a barrel….hmmmm.
It came with the standard 16 inch or so carbine barrel.
I came across a sweet 20 inch stainless steel barrel in the PX and bought it. I have probably fired 1000 rounds through it. Shoots great.
Any way, last night while cleaning the rifle I note a ghost imprint of the back of the gas key on the top of my lower receiver at the buffer tube.
May have been there since I fired my first round on the rifle.
I don’t like it.
Last thing I want to do is beat my lower or shear off the gas key.
Gas block on the twenty inch barrel is slightly forward of the 16 inch barrel gas block by maybe an inch, just enough to have it sit past the end of the quad rail. The sixteen incher is in the quad rail IIRC.
I’m thinking the extra gas going through the tube before the bullet exits the barrel is causing this.
Liking the twenty inch barrel but not liking the impact on the lower receiver.
Perhaps a heavier buffer or spring but What might do is cut the twenty to 18 inches which is what I really wanted for a barrel….hmmmm.