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Does anyone know the diameter of the gas port on a rifle length .308 AR? I am assembling a DPMS upper using a Shilen barrel and can determine the gas block location, but I don't know the hole diameter. Anyone?

Does anyone know if the barrel extension from the Armalite AR 10 series rifles matches the DPMS series extension? I ask this because I am building a .308 upper assembly for a Fulton Armory lower receiver and cannot find a barrel extension. The Fulton Armory rifles are DPMS patterned. Any help...

I have been looking at the Douglas barrels for my Garand. They list a 4 groove and a 6 groove. Can anyone here tell me significance, other than the obvious number of grooves? I have ruled out Krieger barrels, as nicely finished as they are, they are not stress relieved after machining and I...

I am rebarreling a Garand in either 30-06 or .308, I haven't decided which yet. One plus for the .308 chambering would be the option of shooting modern surplus ammo. Does anyone here know if the pressure curve on modern 7.62x51 mil spec will cycle a Garand without damaging the operating rod?

I have a heavy barreled Mini 14, it normally shoots nice small groups. In an attempt to improve ignition, I increased the hammer spring tension. Instead of smaller, my groups were three times larger. At the range I tried single loading, mag in, mag out and determined that bolt position was the...

I have a Savage action in a McMillan A5 stock with a Nightforce scope, without ammo it weighs 12 lbs 8 oz, and this is with a medium weight barrel. I was wondering if every heavy barrel rifle has to be that heavy. I know it is simple math, just add up the components, and heavy rifles are...

I am assembling a tactical style rifle with an A5 Mcmillan stock, Savage action, and a Nightforce scope. It will be chambered in .308 Win. In the past I have shot a lot of handloaded .308 in decent bolt guns, and settled on 42.5 gr. of IMR 4064 behind a Sierra 168 gr. Match King. This was before...

I have a Nikon Buckmark 4x14 on a Mini 14 that I suspect is wandering. I have replaced the factory barrel with a heavy Krieger and it has always shot nice small groups, now they have opened up in a distinct stringing pattern. I can change scopes to test this rifle, but I was wondering what...

I ordered an A-5 stock from Mcmillan in mid May, it has now been over 5 months, is this typical? Has anyone had a similar experience?