05-10-2021, 04:30 PM
I do Gas Blocks with the 'ole pencil line and straight edge through the center of the ports (barrel/block) method. I then confirm with a $30 Borescope off of Amazon, on a Windows 10 Tablet. I doubt the .020 thousandths matters, as the GB port is a lot larger. I have an SA AGB, and it is 40 clicks "out" with a Sprinco Orange Spring, and an H3 Buffer. I shoot with a Can (Rugged Razor - so not extremely restrictive, but there is some), so that is just for me, with an 18" BA barrel.
My experience with ASC mags has not been a positive one. KM Tactical just had a bunch of Orange Follower ones, so I bough one of each capacity. The 10 rounder - holds 9, but it feeds. The larger capacity one (I forget if it's 15/20/25) pops out of the magwell on each shot. I'm sticking with Duramags, all capacities of which, are perfect.
If I were you, I'd first get a Duramag. If that doesn't work, I'd remount the block and if you can afford it, borescope it to confirm. Then I'd open the SA block all the way (usually about 45 clicks) and fire one. Repeat (going 4 clicks at a time, to save ammo) until you get Lock Back, then go one or two more for fouling.
If you get lock back with that AGB all the way "out" (open). you'll need to up the spring and or buffer. I prefer upping the spring rate first, as why add mass if you don't need it. Sprinco has Blue, Red and Orange, which are all above their White, which is stock Carbine rate.
My experience with ASC mags has not been a positive one. KM Tactical just had a bunch of Orange Follower ones, so I bough one of each capacity. The 10 rounder - holds 9, but it feeds. The larger capacity one (I forget if it's 15/20/25) pops out of the magwell on each shot. I'm sticking with Duramags, all capacities of which, are perfect.
If I were you, I'd first get a Duramag. If that doesn't work, I'd remount the block and if you can afford it, borescope it to confirm. Then I'd open the SA block all the way (usually about 45 clicks) and fire one. Repeat (going 4 clicks at a time, to save ammo) until you get Lock Back, then go one or two more for fouling.
If you get lock back with that AGB all the way "out" (open). you'll need to up the spring and or buffer. I prefer upping the spring rate first, as why add mass if you don't need it. Sprinco has Blue, Red and Orange, which are all above their White, which is stock Carbine rate.