ROLEXrifleman
Master
b4 i can shoot it, and log the results I gotta assemble it.
To give the barrel a fighting chance I decided to make it the weakest link in the upper.
Here's the parts break down:
Vltor VIS3 upper
Vltor .750 gas block
DSG Carbine gas tube
Colt BCG
and the Bear Creek Barrel
all the other add on will be listed as I complete the rifle build.
prior to loading the barrel I ran a patch through it:
I greased the barrel extension:
Generally this is the spot where I would post pics of the rest of the barrel install... not the case with this assembly!
Even well lubed when I went to install the barrel it only went in a quarter inch. At first I thought, ****, this barrel extension is out of spec! so i took two different mics and measured up the extension, 1.000 on both. If we play it be the numbers milspec is .9980 so we are talking .002" of an inch over. I've installed many barrels over the years and usually the receiver gobbles them up with very little resistance. I tried to again, nope, quarter inch in at best.
Called VLTOR and asked about it, guy on the phone said, " Ya, things can get tight with our receivers. Load the barrel into the receiver as deep as you can, then tap it in by dropping the end of the receiver on a padded bench top."
After about 5 minutes, nothing. I pulled out a brand new 1" lapping bar and measured it, 1.000. tried running it through the receiver and it acted just like the barrel. After what seemed like 1 hour ( 13 minutes) i had finally lapped the receiver. Almost nothing was taken off. Reinserted the barrel and for the next 10 minutes did as VLTOR directed till finally the barrel seated. I sure hope to god this barrel isnt a lemon cause the way it fits into this upper is a dream!
Torques the barrel nut to 40 foot lbs:
centered and tightened the gas block:
And here you go!
To give the barrel a fighting chance I decided to make it the weakest link in the upper.
Here's the parts break down:
Vltor VIS3 upper
Vltor .750 gas block
DSG Carbine gas tube
Colt BCG
and the Bear Creek Barrel
all the other add on will be listed as I complete the rifle build.
prior to loading the barrel I ran a patch through it:
I greased the barrel extension:
Generally this is the spot where I would post pics of the rest of the barrel install... not the case with this assembly!
Even well lubed when I went to install the barrel it only went in a quarter inch. At first I thought, ****, this barrel extension is out of spec! so i took two different mics and measured up the extension, 1.000 on both. If we play it be the numbers milspec is .9980 so we are talking .002" of an inch over. I've installed many barrels over the years and usually the receiver gobbles them up with very little resistance. I tried to again, nope, quarter inch in at best.
Called VLTOR and asked about it, guy on the phone said, " Ya, things can get tight with our receivers. Load the barrel into the receiver as deep as you can, then tap it in by dropping the end of the receiver on a padded bench top."
After about 5 minutes, nothing. I pulled out a brand new 1" lapping bar and measured it, 1.000. tried running it through the receiver and it acted just like the barrel. After what seemed like 1 hour ( 13 minutes) i had finally lapped the receiver. Almost nothing was taken off. Reinserted the barrel and for the next 10 minutes did as VLTOR directed till finally the barrel seated. I sure hope to god this barrel isnt a lemon cause the way it fits into this upper is a dream!
Torques the barrel nut to 40 foot lbs:
centered and tightened the gas block:
And here you go!