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- Nov 23, 2012
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No but thought about adding it. The buffer spring combo on the lower seems to cycle well with 300b/o suppressed and non suppressed. Also the 556.
I might ask Bear Creek what kind of port they have and whether they suggest going with an adjustable block. Some manufacturers get kinda picky about that.
Regardless, I tend to run the same buffer/spring combo in everything, Springco Blue and H2. Cycles perfectly fine in my 5.56 even with cheap Russian bulk .223 (even Tula) and with my 6.8. I've run or installed that combo in BCM, Adcor (piston system), Colt (shhhhh!), Daniel Defense, Palmetto, Sig, FN, Bushmaster and in the various builds I've done for others. Never had a problem or heard of one. Only issue was the DD and it was in the first 100 rounds during the "break in" period.
For obvious reasons, I haven't/can't run it in the -10 platform. I trust Slash Heavy Buffers for that job though I do use the rifle spring with his buffers.