CMMG 8.5" 300blk
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Re: CMMG 8.5" 300blk
A machine gun is not a rifle so it cannot be an SBR.
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Re: CMMG 8.5" 300blk
... chuckle ...
M16 is a shortie as registered ... but doesn't matter anyway.
M16 is a shortie as registered ... but doesn't matter anyway.
Re: CMMG 8.5" 300blk
I went with the upper not just the barrel.
8.5 in. CMMG upper...
8.5 in. CMMG upper...
Re: CMMG 8.5" 300blk
Here is my pistol with an 8" CMMG 1:7 300BLK barrel. It runs perfectly, but I'm also still developing loads right now. I have my subsonics almost completely dialed in, need to test a few more loads, just bring the muzzle velocity up a bit. Then I will start developing my supersonic loads.
Re: CMMG 8.5" 300blk
nice build I hope you enjoy it as much as I enjoy mine . you will find they shoot super-sonic pretty damn good .
bye the way there is no need for the suppressor wrap I can assure you that once is the only time you will grab a hot suppressor. I know a guy who done that
bye the way there is no need for the suppressor wrap I can assure you that once is the only time you will grab a hot suppressor. I know a guy who done that
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Re: CMMG 8.5" 300blk
flashmc wrote:Here is my pistol with an 8" CMMG 1:7 300BLK barrel. It runs perfectly, but I'm also still developing loads right now. I have my subsonics almost completely dialed in, need to test a few more loads, just bring the muzzle velocity up a bit. Then I will start developing my supersonic loads.
Who makes your buffer tube?
Re: CMMG 8.5" 300blk
did i read that these barrels come with a .110 gas port? was thinking of opening mine up just a hair. running all milspec moving internals and had a failure to lock(once). this was on gemtech 187 grn poly tip. also not sure if my barrel is 8 or 8.5.
Re: CMMG 8.5" 300blk
I have shot gemtech in my 8.5 inch cmmg and yes it functioned but marginal at best . try a better quality ammo and see what happens . open up the gas port and you will start having trouble with super sonics being over gassed . for every action there is an equal and opposite reaction .brian1570 wrote:did i read that these barrels come with a .110 gas port? was thinking of opening mine up just a hair. running all milspec moving internals and had a failure to lock(once). this was on gemtech 187 grn poly tip. also not sure if my barrel is 8 or 8.5.
Re: CMMG 8.5" 300blk
ok cool. still need to play with ammo types so this might just be a one time thing.jwb47 wrote:I have shot gemtech in my 8.5 inch cmmg and yes it functioned but marginal at best . try a better quality ammo and see what happens . open up the gas port and you will start having trouble with super sonics being over gassed . for every action there is an equal and opposite reaction .brian1570 wrote:did i read that these barrels come with a .110 gas port? was thinking of opening mine up just a hair. running all milspec moving internals and had a failure to lock(once). this was on gemtech 187 grn poly tip. also not sure if my barrel is 8 or 8.5.
also i noticed that there was a lot of un-burned powder. is this because of the gemtech stuff or are all subs dirty?
Re: CMMG 8.5" 300blk
My limited experience with gemtech says yes its dirty
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