A great discussion of which weight of buffer to use in an LMT 10.5" can be found in the below threads, but I would like to poll those who run 10.5" barrels (factory 10.5" barrels, not longer barrels cut down to 10.5"), to see what buffers each uses and with which ammo types unsuppressed.
The intent here is to see how much variation there is in reliability with different ammo types, buffer weights, and barrel makes (reliability here meaning locking back the bolt on an empty mag and no short-stroking).
Also, please state what round count your barrel has and whether you could begin using a heavier buffer at higher round counts than you could get away with before.
Please also note barrel manufacturer.
https://www.m4carbine.net/showthread...ht=buffer+10.5
https://www.m4carbine.net/showthread...ht=buffer+10.5
Here is an example of what I am looking for:
Barrel type: 10.5" LMT, medium contour, MRP barrel.
Round count: 3,000.
BCG: LMT FA.
Buffer weight: H2
Muzzle attachment: standard A2 FH.
Spring Type: Standard carbine.
Reliability: Runs fine with this buffer weight unsuppressed and the following ammo types: Wolf, Brown Bear, Winchester WB 5.56, M855, and Mk262.
Subjective estimate of felt recoil: shoots as soft as a 14.5" carbine with a standard buffer, but much more oomph than a 16" middy. One could also include here the reason or why one prefers this combination.


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